Page 1 of 40
                                                    Index to Exhibits on Page 15

                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 10-Q
(Mark One)

 [X]         QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended February 29, 2000.

                                       OR

[  ]         TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________________ to ____________________.

Commission file number 1-3208.

                        NATIONAL SERVICE INDUSTRIES, INC.
             (Exact name of registrant as specified in its charter)

             Delaware                                   58-0364900
 (State or other jurisdiction of         (I.R.S. Employer Identification Number)
  incorporation or organization)

             1420 Peachtree Street, N.E., Atlanta, Georgia   30309-3002
               (Address of principal executive offices)      (Zip Code)

                                 (404) 853-1000
              (Registrant's telephone number, including area code)

                                      None
              (Former Name, Former Address and Former Fiscal Year,
                         if Changed Since Last Report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                                Yes [ X ] No [ ]

Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date.

Common Stock - $1.00 Par Value - 40,726,493 shares as of March 31, 2000




Page 2


               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES

                                      INDEX



                                                                     Page No.
                                                                ----------------

PART I.  FINANCIAL INFORMATION

  ITEM 1.FINANCIAL STATEMENTS

            CONSOLIDATED BALANCE SHEETS -
            FEBRUARY 29, 2000 AND AUGUST 31, 1999                       3

            CONSOLIDATED STATEMENTS OF INCOME -
            THREE MONTHS AND SIX MONTHS ENDED
            FEBRUARY 29, 2000 AND FEBRUARY 28, 1999                     4

            CONSOLIDATED STATEMENTS OF CASH FLOWS -
            SIX MONTHS ENDED FEBRUARY 29, 2000 AND FEBRUARY 28, 1999    5

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS                 6-9

  ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
         CONDITION AND RESULTS OF OPERATIONS                          10-12

  ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT
         MARKET RISK                                                   12

PART II. OTHER INFORMATION

  ITEM 6.EXHIBITS AND REPORTS ON FORM 8-K                              13

SIGNATURES                                                             14

EXHIBIT INDEX                                                          15





                                                                          Page 3




               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES
                     CONSOLIDATED BALANCE SHEETS (Unaudited)
                 (In thousands, except share and per-share data)
                                                                                          February 29,      August 31,
                                                                                              2000             1999
                                                                                        -----------------  -------------

ASSETS
Current Assets:
                                                                                                       
      Cash and cash equivalents                                                               $    1,483     $    2,254
      Receivables, less reserves for doubtful accounts of $7,275 at February 29,
           2000 and $6,306 at August 31, 1999                                                    377,441        382,188
      Inventories, at the lower of cost (on a first-in, first-out basis) or market               243,276        218,191
      Linens in service, net of amortization                                                      56,988         58,875
      Deferred income taxes                                                                       11,643         10,271
      Prepayments                                                                                 14,838          8,634
                                                                                        -----------------  -------------
           Total Current Assets                                                                  705,669        680,413
                                                                                        -----------------  -------------

Property, Plant, and Equipment, at cost:
      Land                                                                                        28,193         25,764
      Buildings and leasehold improvements                                                       191,949        186,776
      Machinery and equipment                                                                    614,720        587,719
                                                                                        -----------------  -------------
           Total Property, Plant, and Equipment                                                  834,862        800,259
      Less-Accumulated depreciation and amortization                                             438,117        417,946
                                                                                        -----------------  -------------
           Property, Plant, and Equipment-net                                                    396,745        382,313
                                                                                        -----------------  -------------

Other Assets:
      Goodwill and other intangibles                                                             545,376        551,995
      Other                                                                                       77,308         81,068
                                                                                        -----------------  -------------
           Total Other Assets                                                                    622,684        633,063
                                                                                        -----------------  -------------
                Total Assets                                                                  $1,725,098     $1,695,789
                                                                                        =================  =============

LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities:
      Current maturities of long-term debt                                                    $      324     $      368
      Commercial paper, short-term                                                               172,050        102,539
      Notes payable                                                                               11,474         11,471
      Accounts payable                                                                           126,688        128,122
      Accrued salaries, commissions, and bonuses                                                  35,241         65,458
      Current portion of self-insurance reserves                                                   9,108          8,785
      Accrued taxes payable                                                                            -         12,203
      Other accrued liabilities                                                                   75,539         94,939
                                                                                        -----------------  -------------
           Total Current Liabilities                                                             430,424        423,885
                                                                                        -----------------  -------------

Long-Term Debt, less current maturities                                                          434,007        435,199
                                                                                        -----------------  -------------
Deferred Income Taxes                                                                             95,517         95,557
                                                                                        -----------------  -------------
Self-Insurance Reserves, less current portion                                                     37,158         38,828
                                                                                        -----------------  -------------
Other Long-Term Liabilities                                                                       85,892         86,446
                                                                                        -----------------  -------------

Stockholders' Equity:
      Series A participating  preferred stock, $.05 stated value, 500,000 shares
           authorized, none issued
      Preferred  stock,  no par value,  500,000 shares  authorized,  none issued
      Common stock,  $1 par value,  120,000,000  shares  authorized,  57,918,978
           shares issued                                                                          57,919         57,919
      Paid-in capital                                                                             30,451         29,055
      Retained earnings                                                                          994,683        976,461
      Accumulated other comprehensive income items                                                (9,086)        (9,326)
                                                                                        -----------------  -------------
                                                                                               1,073,967      1,054,109
      Less-Treasury stock, at cost (17,192,485 shares at February 29, 2000 and
           17,449,752 shares at August 31, 1999)                                                 431,867        438,235
                                                                                        -----------------  -------------
           Total Stockholders' Equity                                                            642,100        615,874
                                                                                        -----------------  -------------
                Total Liabilities and Stockholders' Equity                                    $1,725,098     $1,695,789
                                                                                        =================  =============


The accompanying notes to consolidated financial statements are an integral part
of these balance sheets.




Page 4




               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES
                  CONSOLIDATED STATEMENTS OF INCOME (Unaudited)
                      (In thousands, except per-share data)


                                                          THREE MONTHS ENDED                 SIX MONTHS ENDED
                                                     ------------------------------   -----------------------------
                                                     February 29,    February 28,     February 29,   February 28,
                                                         2000            1999             2000           1999
                                                     -------------- ---------------   -------------- --------------


Sales and Service Revenues:
                                                                                         
      Net sales of products                          $     527,994  $      436,564    $   1,070,288  $     880,021
      Service revenues                                      77,419          73,795          155,135        149,264
                                                     -------------- ---------------   -------------- --------------
           Total Revenues                                  605,413         510,359        1,225,423      1,029,285
                                                     -------------- ---------------   -------------- --------------

Costs and Expenses:
      Cost of products sold                                319,985         263,394          647,137        525,095
      Cost of services                                      44,805          45,608           89,939         89,345
      Selling and administrative expenses                  192,981         165,743          386,714        335,950
      Interest expense, net                                 10,527           2,537           20,513          4,879
      Gain on sale of businesses                              (170)         (3,511)            (356)        (3,511)
      Restructuring expense, asset impairments,
           and other charges                                     -          (2,216)               -         (2,216)
      Other expense (income), net                            4,155            (623)           8,494           (614)
                                                     -------------- ---------------   -------------- --------------
           Total Costs and Expenses                        572,283         470,932        1,152,441        948,928
                                                     -------------- ---------------   -------------- --------------

Income before Provision for Income Taxes                    33,130          39,427           72,982         80,357

Provision for Income Taxes                                  12,854          14,665           28,316         29,891
                                                     -------------- ---------------   -------------- --------------

Net Income                                           $      20,276  $       24,762    $      44,666  $      50,466
                                                     ============== ===============   ============== ==============

Per Share:
      Basic Earnings per Share                       $         .50  $          .60    $        1.10  $        1.22
                                                     ============== ===============   ============== ==============
      Basic Weighted Average Number
      of Share Outstanding                                  40,711          41,046           40,641         41,219
                                                     ============== ===============   ============== ==============

      Diluted Earnings per Share                     $         .50  $          .60    $        1.10  $        1.22
                                                     ============== ===============   ============== ==============
      Diluted Weighted Average Number
      of Shares Outstanding                                 40,737          41,227           40,721         41,412
                                                     ============== ===============   ============== ==============





The accompanying notes to consolidated financial statements are an integral part
of these statements.




                                                                          Page 5




               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)
                                 (In thousands)
                                                                                                       SIX MONTHS ENDED
                                                                                                --------------------------------
                                                                                                February 29,     February 28,
                                                                                                    2000             1999
                                                                                                --------------   --------------

Cash Provided by (Used for) Operating Activities
                                                                                                           
      Net income                                                                                $      44,666    $     50,466
      Adjustments  to  reconcile  net income to net cash  provided by (used for)
      operating activities:
           Depreciation and amortization                                                               42,493          28,988
           Provision for losses on accounts receivable                                                  2,047           2,055
           Gain on the sale of property, plant, and equipment                                          (1,024)           (410)
           Gain on the sale of business                                                                  (356)         (3,511)
           Restructuring expense, asset impairments, and other charges                                      -          (2,216)
           Change in noncurrent deferred income taxes                                                   2,250             941
           Change in assets and liabilities net of effect of acquisitions and divestitures-
                Receivables                                                                             7,083           4,883
                Inventories and linens in service, net                                                (22,185)         (8,990)
                Deferred income taxes                                                                    (817)          2,406
                Prepayments and other                                                                  (4,760)         (2,473)
                Accounts payable and accrued liabilities                                              (45,856)        (24,359)
                Self-insurance reserves and other long-term liabilities                                (2,614)          4,623
                                                                                                --------------   -------------
                      Net Cash Provided by Operating Activities                                        20,927          52,403
                                                                                                --------------   -------------

Cash Provided by (Used for) Investing Activities
      Purchases of property, plant, and equipment                                                     (47,443)        (31,973)
      Sale of property, plant, and equipment                                                            2,094             931
      Sale of businesses                                                                                    -             631
      Acquisitions                                                                                    (21,533)        (39,234)
      Change in other assets                                                                            1,300            (384)
                                                                                                --------------   -------------
           Net Cash Used for Investing Activities                                                     (65,582)        (70,029)
                                                                                                --------------   -------------

Cash Provided by (Used for) Financing Activities
      Proceeds from notes payable, net                                                                      -           2,738
      Issuances of commerical paper, net (less than 90 days)                                           51,045               -
      Issuances of commerical paper (greater than 90 days)                                            140,551               -
      Repayments of commerical paper (greater than 90 days)                                          (122,750)              -
      Borrowings of long-term debt                                                                          -         187,582
      Repayments of long-term debt                                                                       (568)        (80,037)
      Issuances (purchases) of treasury stock, net                                                      2,098         (23,535)
      Cash dividends paid                                                                             (26,444)        (25,952)
                                                                                                --------------   -------------
           Net Cash Provided by Financing Activities                                                   43,932          60,796
                                                                                                --------------   -------------

Effect of Exchange Rate Changes on Cash                                                                   (48)            110
                                                                                                --------------   -------------

Net Change in Cash and Cash Equivalents                                                                  (771)         43,280

Cash and Cash Equivalents at Beginning of Period                                                        2,254          19,146
                                                                                                --------------   -------------

Cash and Cash Equivalents at End of Period                                                      $       1,483    $     62,426
                                                                                                ==============   =============

Supplemental Cash Flow Information:
      Income taxes paid during the period                                                       $      41,932    $     25,941
      Interest paid during the period                                                                  19,677           5,906

Noncash Investing and Financing Activities:
      Treasury shares issued under long-term incentive plan                                     $       5,667               -
      Noncash aspects of sale of businesses--
           Receivables recorded                                                                             -    $        396
           Liabilities assumed                                                                              -             326
      Noncash aspects of acquisitions--
           Liabilities assumed or incurred                                                      $       1,219    $     12,027
           Treasury stock issued                                                                            -             845


The accompanying notes to consolidated financial statements are an integral part
of these statements.






Page 6

               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)
                (In thousands, except share and per-share data)

1.    BASIS OF PRESENTATION

The interim consolidated financial statements included herein have been prepared
by the company without audit and the condensed  consolidated balance sheet as of
August 31, 1999 has been  derived  from  audited  statements.  These  statements
reflect all adjustments,  all of which are of a normal,  recurring nature, which
are, in the opinion of management,  necessary to present fairly the consolidated
financial  position  as of  February  29,  2000,  the  consolidated  results  of
operations for the three and six months ended February 29, 2000 and February 28,
1999, and the consolidated cash flows for the six months ended February 29, 2000
and  February 28, 1999.  Certain  reclassifications  have been made to the prior
year's  financial  statements  to conform to the  current  year's  presentation.
Certain  information  and footnote  disclosures  normally  included in financial
statements prepared in accordance with generally accepted accounting  principles
have been condensed or omitted.  The company  believes that the  disclosures are
adequate to make the information presented not misleading.  It is suggested that
these financial  statements be read in conjunction with the financial statements
and notes thereto  included in the company's  Annual Report on Form 10-K for the
fiscal year ended August 31, 1999.

The results of operations  for the three and six months ended  February 29, 2000
are not necessarily indicative of the results to be expected for the full fiscal
year  because the  company's  revenues  and income are  generally  higher in the
second  half of its  fiscal  year and  because  of the  uncertainty  of  general
business conditions.

2.    ACCOUNTING STANDARDS YET TO BE ADOPTED

Statement of Financial  Accounting Standards No. 133, "Accounting for Derivative
Instruments and Hedging Activities," was issued in June of 1998 and is effective
for all fiscal  quarters of fiscal  years  beginning  after June 15,  2000.  The
company  is in  the  process  of  evaluating  the  impact  of  adoption  on  the
Consolidated Balance Sheets and Consolidated Statements of Income.

3.    BUSINESS SEGMENT INFORMATION



                                                                              Depreciation     Capital
                                                 Sales and     Operating          and        Expenditures
                                                  Service        Profit       Amortization    Including
Six Months Ended February 29, 2000               Revenues        (Loss)         Expense      Acquisitions
                                               -------------- -------------- -------------- --------------

                                                                                   
Lighting Equipment                                $  721,691     $   64,300     $   24,646     $   40,610
Chemical                                             239,508         20,094          5,510          2,251
Textile Rental                                       155,135         11,434          7,556         15,024
Envelope                                             109,089          5,523          3,648          9,214
                                               -------------- -------------- -------------- --------------
                                                   1,225,423        101,351         41,360         67,099
Corporate                                                            (7,856)         1,133          1,877
Interest expense, net                                               (20,513)
                                               -------------- -------------- -------------- --------------
Total                                             $1,225,423     $   72,982     $   42,493     $   68,976
                                               ============== ============== ============== ==============

                                                                              Depreciation     Capital
                                                 Sales and     Operating          and        Expenditures
                                                  Service        Profit       Amortization    Including
Six Months Ended February 28, 1999               Revenues        (Loss)         Expense      Acquisitions
                                               -------------- -------------- -------------- --------------
Lighting Equipment                                $  556,665     $   53,313     $   12,911     $   39,741
Chemical                                             233,440         18,261          4,976          4,323
Textile Rental                                       149,264         15,934          7,265          9,296
Envelope                                              89,916          6,654          2,822         17,511
                                               -------------- -------------- -------------- --------------
                                                   1,029,285         94,162         27,974         70,871
Corporate                                                            (8,926)         1,014            336
Interest expense, net                                                (4,879)
                                               -------------- -------------- -------------- --------------
Total                                             $1,029,285     $   80,357     $   28,988     $   71,207
                                               ============== ============== ============== ==============





                                                                          Page 7



                                                                              Depreciation     Capital
                                                 Sales and     Operating          and        Expenditures
                                                  Service        Profit       Amortization    Including
Three Months Ended February 29, 2000             Revenues        (Loss)         Expense      Acquisitions
                                               -------------- -------------- -------------- --------------
                                                                                   
Lighting Equipment                                $  354,096     $   29,013     $   12,240     $   15,706
Chemical                                             119,607         11,472          2,798            917
Textile Rental                                        77,419          6,306          3,804         11,456
Envelope                                              54,291          2,455          1,867          4,867
                                               -------------- -------------- -------------- --------------
                                                     605,413         49,246         20,709         32,946
Corporate                                                            (5,589)           574            208
Interest expense, net                                               (10,527)
                                               -------------- -------------- -------------- --------------
Total                                             $  605,413     $   33,130     $   21,283     $   33,154
                                               ============== ============== ============== ==============

                                                                              Depreciation     Capital
                                                 Sales and     Operating          and        Expenditures
                                                  Service        Profit       Amortization    Including
Three Months Ended February 28, 1999             Revenues        (Loss)         Expense      Acquisitions
                                               -------------- -------------- -------------- --------------
Lighting Equipment                                $  272,588     $   23,834     $    6,454     $    6,430
Chemical                                             116,696          9,725          2,531          2,016
Textile Rental                                        73,795          9,215          3,632          3,547
Envelope                                              47,280          3,118          1,422         15,142
                                               -------------- -------------- -------------- --------------
                                                     510,359         45,892         14,039         27,135
Corporate                                                            (3,928)           505            290
Interest expense, net                                                (2,537)
                                               -------------- -------------- -------------- --------------
Total                                             $  510,359     $   39,427     $   14,544     $   27,425
                                               ============== ============== ============== ==============





                                                          Identifiable Assets

                                                February 29, 2000       August 31, 1999
                                               -------------------    -------------------
                                                                         
Lighting Equipment                                      $1,080,589             $1,073,936
Chemical                                                   230,013                233,461
Textile Rental                                             214,517                203,509
Envelope                                                   147,664                139,755
                                               -------------------    -------------------
Subtotal                                                 1,672,783              1,650,661
Corporate                                                   52,315                 45,128
                                               -------------------    -------------------
Total                                                   $1,725,098             $1,695,789
                                               ===================    ===================



4.   INVENTORIES

Major  classes of  inventory as of February 29, 2000 and August 31, 1999 were as
follows:



                                                February 29, 2000       August 31, 1999
                                               -------------------    -------------------

                                                                         
Raw Materials and Supplies                              $   87,275             $   99,249
Work-in-Process                                             11,612                 16,718
Finished Goods                                             144,389                102,224
                                               -------------------    -------------------
Total                                                   $  243,276             $  218,191
                                               ===================    ===================



5.    EARNINGS PER SHARE

The company  accounts  for  earnings  per share  using  Statement  of  Financial
Accounting  Standards  ("SFAS")  No.  128,  "Earnings  per  Share."  Under  this
statement,  basic  earnings  per share is  computed  by  dividing  net  earnings
available to common stockholders by the weighted average number of common shares
outstanding during the period.  Diluted earnings per share is computed similarly
but reflects the potential  dilution  that could occur if dilutive  options were
exercised.  The following table  calculates  basic earnings per common share and
diluted earnings per common share at February 29 and February 28:




Page 8


                                                                     Three Months Ended                    Six Months Ended
                                                               February 29,      February 28,      February 29,       February 28,
                                                                   2000              1999              2000               1999
                                                              ---------------    --------------   ---------------   ---------------
Basic earnings per common share:
                                                                                                            
 Net income                                                       $   20,276        $   24,762        $   44,666         $  50,466
 Basic weighted average shares outstanding (in thousands)             40,711            41,046            40,641            41,219
                                                              ---------------    --------------   ---------------   ---------------
 Basic earnings per common share                                  $      .50        $      .60        $     1.10         $    1.22
                                                              ===============    ==============   ===============   ===============

Diluted earnings per common share:
 Net income                                                       $   20,276        $   24,762        $   44,666         $  50,466

 Basic weighted average shares outstanding (in thousands)             40,711            41,046            40,641            41,219
   Add - Shares of common stock issuable upon assumed
   exercise of dilutive stock options (in thousands)                      26               181                80               193
                                                              ---------------    --------------   ---------------   ---------------
 Diluted weighted average shares outstanding (in thousands)           40,737            41,227            40,721            41,412
                                                              ---------------    --------------   ---------------   ---------------

 Diluted earnings per common share                                $      .50        $      .60        $     1.10         $    1.22
                                                              ===============    ==============   ===============   ===============


6.    COMPREHENSIVE INCOME

The company adopted SFAS No. 130, "Reporting Comprehensive Income," in the first
quarter of fiscal 1999.  SFAS No. 130 requires the reporting of a measure of all
changes in equity of an entity  that  result from  recognized  transactions  and
other economic events other than  transactions  with owners in their capacity as
owners.  Other  comprehensive  income  (loss) for the three and six months ended
February  29,  2000  and  February  28,  1999  includes  only  foreign  currency
translation adjustments. The calculation of comprehensive income is as follows:



                                                                     Three Months Ended                    Six Months Ended
                                                               February 29,      February 28,      February 29,       February 28,
                                                                   2000              1999              2000               1999
                                                              ---------------   ---------------   ---------------   ---------------

                                                                                                             
     Net income                                                   $   20,276        $   24,762        $   44,666         $   50,466
     Other comprehensive income (loss)                                   250              (367)              240              1,666
                                                              ---------------   ---------------   ---------------   ---------------
     Comprehensive Income                                         $   20,526        $   24,395        $   44,906         $   52,132
                                                              ===============   ===============   ===============   ===============




7.    ENVIRONMENTAL MATTERS

The company's operations,  as well as similar operations of other companies, are
subject  to  comprehensive  laws and  regulations  relating  to the  generation,
storage,  handling,  transportation,  and disposal of hazardous  substances  and
solid and hazardous wastes and to the remediation of contaminated sites. Permits
and environmental  controls are required for certain of the company's operations
to limit air and water pollution, and these permits are subject to modification,
renewal, and revocation by issuing authorities.  The company believes that it is
in substantial compliance with all material environmental laws, regulations, and
permits.  On an ongoing basis,  the company  incurs capital and operating  costs
relating to environmental  compliance.  Environmental  laws and regulations have
generally  become stricter in recent years, and the cost of responding to future
changes may be substantial.

The company's environmental reserves, which are included in current liabilities,
totaled  $10,788  and  $11,000  at  February  29,  2000  and  August  31,  1999,
respectively. The actual cost of environmental issues may be substantially lower
or higher than that reserved due to the  difficulty  in  estimating  such costs,
potential changes in the status of government regulations,  and the inability to
determine  the  extent  to which  contributions  will be  available  from  other
parties.  The company does not believe that any amount of such costs below or in
excess of that accrued is reasonably estimable.

Certain  environmental  laws,  such as Superfund,  can impose  liability for the
entire cost of site  remediation  upon each of the  current or former  owners or
operators  of a site or  parties  who sent  waste to a site where a release of a
hazardous  substance has occurred  regardless of fault or the  lawfulness of the
original disposal activity.  Generally,  where there are a number of potentially
responsible  parties  ("PRPs") that are financially  viable,  liability has been
apportioned  based on the type and amount of waste  disposed of by each party at
such  disposal  site and the number of  financially  viable  PRPs,  although  no
assurance as to the method of apportioning  the liability can be given as to any
particular site.






                                                                          Page 9

The company is currently a party to, or otherwise involved in, legal proceedings
in connection with state and federal  Superfund  sites, two of which are located
on  property  owned by the  company.  Except  for the  Crymes  Landfill  and M&J
Solvents matters in Georgia, the company believes its liability is de minimis at
each of the sites which it does not own where it has been named as a PRP. At the
Crymes  Landfill  and M&J  Solvents  sites in  Georgia,  since the  matters  are
currently  in the  investigative  phase,  the company  does not know whether its
liability is de minimis but  believes  that its exposure at each of the sites is
not  likely to result in a material  adverse  effect on the  company  due to its
limited  involvement  at the sites and the number of viable  PRPs.  For property
which the company owns on Seaboard Industrial Boulevard in Atlanta, Georgia, the
company has  conducted an  investigation  on its and  adjoining  properties  and
submitted  a  Compliance   Status  Report   ("CSR")  to  the  State  of  Georgia
Environmental Protection Division ("EPD") pursuant to the Georgia Hazardous Site
Response Act. The company is currently  responding to EPD's  comments  regarding
the CSR.  Until the CSR is completed,  the company will not be able to determine
if remediation will be required,  if the company will be solely  responsible for
the cost of such  remediation,  or  whether  such  cost is likely to result in a
material  adverse effect on the company.  For property which the company owns on
East Paris Street in Tampa, Florida, the company has been requested by the State
of Florida to clean up chlorinated  solvent  contamination in the groundwater on
the property and on surrounding  property known as Seminole Heights Solvent Site
and to reimburse  approximately  $430 of costs already  incurred by the State of
Florida in connection with such contamination.  The company believes that it has
a strong defense due to likely off-site sources of the contamination and because
contamination  from the  property,  if any,  was due to prior owners and not the
company's  operations.  At this time,  it is too early to quantify the company's
potential exposure or the likelihood of an adverse result.

The company is currently evaluating emissions of volatile organic compounds from
its manufacturing  operations in the Atlanta,  Georgia area to determine whether
it will need to install  pollution control equipment or modify its operations to
comply  with  federal  and state air  pollution  regulations.  Until the current
evaluations are completed, the company is not able to quantify the possible cost
of compliance.  However, based upon currently available information, the company
does not expect  that any  material  expenditures  will be  required  to achieve
compliance.

In connection with the sale of the North Bros.  business and 29 of the company's
textile  rental  plants  in  1997,   the  company  has  retained   environmental
liabilities  arising  from events  occurring  prior to the  closing,  subject to
certain  exceptions.  The  company  has  received  notice  from the buyer of the
textile rental plants of the alleged presence of perchloroethylene contamination
on one of the properties involved in the sale. The company has since asserted an
indemnification claim against the company from which it bought the property. The
prior owner is currently conducting an investigation of the contamination at its
expense,  subject to a reservation  of rights.  At this time, it is too early to
quantify the company's  potential  exposure in this matter, the likelihood of an
adverse result,  or the  possibility  that the company may be fully or partially
indemnified.

The State of New York has filed a lawsuit against the company  alleging that the
company is responsible as a successor to Serv-All  Uniform Rental Corp. for past
and future response costs in connection  with the release or threatened  release
of hazardous substances at and from the Blydenburgh Landfill in Islip, New York.
The company believes that it is not a successor to Serv-All Uniform Rental Corp.
and therefore has no liability with respect to the Blydenburgh Landfill,  and it
has responded to the lawsuit accordingly. At this stage of the litigation, it is
too early to quantify the company's  potential  exposure or the likelihood of an
adverse result.

8.    INCREASE IN SHARES AUTHORIZED UNDER LONG-TERM ACHIEVEMENT INCENTIVE PLAN

On January 5, 2000,  the  stockholders  approved an  amendment  to the  National
Service Industries, Inc. Long-Term Achievement Incentive Plan for the benefit of
officers  and  other  key  employees  of  the  company.  In  addition  to  other
modifications,  the  amendment  increases  the number of shares  authorized  for
issuance under the plan from 1,750,000 to 5,750,000.





Page 10

                      MANAGEMENT'S DISCUSSION AND ANALYSIS

                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following  discussion  should be read in conjunction  with the  consolidated
financial statements and related notes.

National Service Industries is a diversified  service and manufacturing  company
operating in four segments: lighting equipment,  chemicals,  textile rental, and
envelopes.  The company continued to be in solid financial condition at February
29, 2000.  Net working  capital was $275.2  million,  up from $256.5  million at
August 31, 1999, and the current ratio remained constant at 1.6. At February 29,
2000, the company's percentage of debt to total capitalization increased to 49.0
percent from 47.2 percent at August 31, 1999.

Results of Operations

National Service Industries generated revenue of $605.4 million and $1.2 billion
in the three and six months ended February 29, 2000, respectively, compared with
revenue of $510.4  million  and $1.0  billion in the three and six months  ended
February 28, 1999,  respectively.  The  increase was  primarily  due to acquired
revenue in the lighting equipment and envelope segments.  The lighting equipment
segment purchased Holophane  Corporation  ("Holophane") in July 1999 and certain
assets of Peerless  Corporation  ("Peerless")  in April 1999.  In addition,  the
envelope  segment  purchased  substantially  all of Gilmore Envelope in February
1999. These acquisitions  generated combined revenue of $70.3 million and $155.6
million for the three and six months ended February 29, 2000, respectively, that
was  not  included  in  prior-year  results.  Excluding  acquisitions,   revenue
increased in each of the company's core businesses.

Net  income  totaled  $20.3  million  and $44.7  million,  or $.50 and $1.10 per
diluted  share,   for  the  three  and  six  months  ended  February  29,  2000,
respectively, compared to net income of $24.8 million and $50.5 million, or $.60
and $1.22 per diluted  share,  for the three and six months  ended  February 28,
1999.  Income from  acquisitions  not  included in prior year results and income
from core business growth in the lighting  equipment and chemical  segments were
more than offset by increased  interest  expense on borrowings and  amortization
expense related to recent acquisitions. Additionally, operating profit decreased
in the textile rental segment as the second quarter of fiscal 1999 included $3.5
million in unusual gains  compared to $.7 million  during the second  quarter of
fiscal 2000.  Current year to date net income also included a charge for closing
a manufacturing facility in the lighting equipment segment.

The lighting  equipment  segment  reported  revenue of $354.1 million and $721.7
million for the three and six months  ended  February  29,  2000,  respectively,
representing  an increase of 29.9 percent and 29.6  percent over the  respective
periods  of  the  prior  year.  These  increases  resulted  primarily  from  the
acquisitions of Holophane and Peerless. Additionally,  continued strength in the
non-residential  construction market had a positive impact on lighting equipment
revenue  resulting in growth in the segment's  core business.  Operating  profit
increased  21.7  percent  and 20.6  percent  for the three and six months  ended
February 29, 2000,  respectively,  driven by  contributions  from  Holophane and
Peerless, growth in the segment's core business, and containment of fixed costs,
offset  somewhat by a $1.0 million  pretax  charge  during the first  quarter of
fiscal 2000 for closing a manufacturing facility in California.

Chemical segment revenue  increased 2.5 percent to $119.6 million for the second
quarter  and 2.6 percent to $239.5  million for the six months due to  continued
growth in the retail  channel  and higher  revenue  from the  institutional  and
industrial channels,  resulting primarily from an increase in the segment's core
business.  Operating  profit of $11.5 million and $20.1 million during the three
and six months  ended  February  29,  2000,  respectively,  was higher than last
year's  results  primarily  due to a  reduction  in general  and  administrative
expenses, fluctuations in selling expenses, and an increase in revenue.

Textile  rental  segment  revenue,  representing  all of the  company's  service
revenues, increased 4.9 percent to $77.4 million for the quarter and 3.9 percent
to $155.1  million for the six months.  The current  year  revenue  increase was
primarily  related to acquired revenue and price increases in the segment's base
business,  offset somewhat by the negative impact of ice storms in the Southeast
during the second quarter.  Operating profit decreased to $6.3 million from last
year's $9.2  million  for the second  quarter  and to $11.4  million  from $15.9
million for the first half of the year  primarily as a result of $3.5 million of
unusual items being included in the prior year compared to a $.7 million gain on
the sale of property in the current quarter.  Operating profit for the three and
six months  ended  February  28, 1999  included  $5.7  million of unusual  gains
related to the 1997 uniform plants  divestiture  and  restructuring  activities,
offset  by  a  $2.2  million   write-off  for  merchandise   inventory  used  by
unprofitable accounts.  Excluding unusual items in both years, operating margins
for the quarter remained flat. However,  year to date margins declined as higher
fuel costs,  the impact of adverse  weather,  and contract  wage  increases  for
production employees more than offset the increase in revenue.

Envelope  segment  revenue  increased  14.8  percent to $54.3  million  and 21.3
percent to $109.1  million for the three and six months ended February 29, 2000,
respectively,  while operating profit decreased 21.3 percent to $2.5 million and
17.0  percent to $5.5  million for the three and six months  ended  February 29,
2000, respectively.



                                                                         Page 11

Revenue  increased due to additional  sales resulting from the Gilmore  Envelope
acquisition and continued volume growth in the base business, offset somewhat by
the prior year  divestiture  of  Techno-Aide/Stumb  Metal Products in June 1999.
Operating margin percentages decreased during the three and six month periods as
a result of lower  average  margins from prior year  acquisitions,  higher paper
prices which were passed on to customers,  pre-production  costs associated with
newly acquired manufacturing  equipment,  and depreciation from a new enterprise
resource planning system.

Corporate expenses increased to $5.6 million during the second quarter primarily
due to costs  related to strategic  initiatives.  For the six months,  corporate
expenses  decreased  to $7.9 million as costs  related to strategic  initiatives
were  offset by lower  incentive  compensation  expense.  Net  interest  expense
increased  $8.0 million to $10.5  million and $15.6 million to $20.5 million for
the three and six months ended February 29, 2000,  respectively,  as a result of
increased borrowings to finance recent acquisitions. Additionally, the provision
for income taxes was 38.8 percent of pretax income for the quarter compared with
37.2 percent in the prior-year  period primarily due to goodwill recorded in the
Holophane acquisition, which is not deductible for tax purposes.


Liquidity and Capital Resources

Operating Activities

Operations  provided cash of $20.9 million  during the first half of fiscal 2000
compared with $52.4 million during the first six months of fiscal 1999. The 2000
cash flow was lower  primarily  because  of a decrease  in  current  liabilities
related to  incentive  compensation  plan  payments,  an  increase in income tax
payments,  and a  decrease  in  accounts  payable.  Additionally,  increases  in
inventory, offset somewhat by a decrease in accounts receivable primarily in the
lighting equipment  segment,  contributed to the decrease in operating cash flow
compared to the prior year.

Investing Activities

Investing  activities  used  cash of  $65.6  million  for the six  months  ended
February  29, 2000  compared  with cash used of $70.0  million in the six months
ended February 28, 1999. The change in investing cash flows relates primarily to
a decrease  in  acquisition  spending  offset by an  increase  in  purchases  of
property, plant, and equipment. Acquisition spending during the first six months
of fiscal 2000 was $21.5 million and related primarily to Holophane. The company
purchased  Holophane in July 1999 for  approximately  $470.8 million,  including
approximately  $20 million for the payoff of  Holophane's  existing debt. Of the
total  purchase  price,  $454.6  million was paid  during  fiscal 1999 and $14.5
million  was paid  during the first six months of the  current  year,  which was
primarily  for the cash-out of remaining  Holophane  shares.  Other  acquisition
spending during the first half of fiscal 2000 related to several minor purchases
in the textile rental segment.  Prior year acquisition spending of $39.2 million
was primarily due to the lighting equipment segment's purchase of certain assets
of GTY  Industries  (d/b/a  "Hydrel"),  a  manufacturer  of  architectural-grade
lighting fixtures for landscape,  in-grade, and underwater applications, and the
envelope  segment's  purchase  of  substantially  all of  Gilmore  Envelope,  an
envelope manufacturer headquartered in Los Angeles, California.

Capital  expenditures were $47.4 million in the first six months of fiscal 2000,
compared  with $32.0  million in the first six  months of fiscal  1999.  Capital
spending during the first half of fiscal 2000 was primarily  attributable to the
lighting  equipment,   envelope,  and  textile  rental  segments.  The  lighting
equipment segment invested in land, buildings, and equipment for a new plant and
in manufacturing upgrades and improvements. Capital expenditures in the envelope
segment  related  primarily  to  new  folding  capacity,  manufacturing  process
improvements, and information systems. The textile rental segment's expenditures
related  to  replacing   old  equipment   and  delivery   truck   purchases  and
refurbishments.  The lighting  equipment  segment's capital  expenditures in the
prior-year  first half related to the purchase of land and  buildings  for a new
plant,  manufacturing  improvements  and upgrades for  capacity  expansion,  and
implementation of new technology.  Textile rental segment  expenditures were for
implementation of new technology,  production  enhancements,  and delivery truck
purchases  and  refurbishments.  The  envelope  segment's  expenditures  related
primarily to manufacturing process improvements,  information systems,  facility
expansion, and new folding capacity.  Management believes current cash balances,
anticipated  cash flows from  operations,  available  funds from the  commercial
paper program or the committed credit facilities, and the complementary lines of
credit are  sufficient to meet the company's  planned level of capital  spending
and general operating cash requirements for the next twelve months.

Financing Activities

Cash provided by financing  activities  decreased $16.9 million to $43.9 million
in the first half of fiscal  2000  primarily  as a result of a decrease  in cash
provided by net  borrowings,  offset by the  suspension of the  company's  share
repurchase program in the third quarter of fiscal 1999. Although the company has
a standing annual authorization to repurchase 2.0 million shares plus the number
of new shares  issued in any one year,  the  company  does not plan to  purchase
additional  shares  until its debt to  capitalization  is within  the  company's
stated  objective  of 30 to 40 percent.  For the six months  ended  February 29,
2000, net borrowings,  primarily under the company's  commercial  paper program,
provided cash of $68.3 million  compared with cash provided by net borrowings of
$110.3 million during the same period of the prior year. Current year borrowings
were  used  for  general   corporate   purposes,   including   working   capital
requirements,  capital expenditures,  and acquisitions. At February 29, 2000 and
August 31, 1999,



Page 12

approximately  $250 million in commercial  paper was  classified as long-term as
the company has the ability to  refinance  the  commercial  paper on a long-term
basis.  Funds borrowed  during the first half of fiscal 1999 were used primarily
to finance  acquisitions,  share  repurchases,  and  internal  growth.  Dividend
payments  totaled  $26.4  million,  or 65 cents per share,  compared  with $26.0
million,  or 63 cents per share, for the prior-year  period. On January 5, 2000,
the regular  quarterly  dividend  rate was increased 3.1 percent to 33 cents per
share, or an annual calendar year rate of $1.32 per share.

Environmental Matters

See Note 7: Environmental Matters for a discussion of the company's
environmental issues.

Impact of the Year 2000 Issue

The company did not  experience,  nor does it expect to experience,  significant
disruptions to its mission  critical  systems related to the Year 2000 Issue. As
of April 14,  2000,  all of the  company's  mission  critical  systems have been
tested and are fully  operational.  However,  no assurance can be given that the
cost of remediating  any problems  associated  with the Year 2000 Issue will not
materially affect the company's business.

Quantitative and Qualitative Disclosures about Market Risk

The company is exposed to market risks that may impact the Consolidated  Balance
Sheets,  Consolidated  Statements of Income, and Consolidated Statements of Cash
Flows due to changing  interest rates and foreign  exchange  rates.  The company
does not currently  participate in any significant hedging activities,  nor does
it currently  utilize any  significant  derivative  financial  instruments.  The
following  discussion  provides additional  information  regarding the company's
market risks.

Interest Rates- Interest rate  fluctuations  expose the company's  variable-rate
debt to changes in interest expense and cash flows. The company's  variable-rate
debt,  primarily  commercial  paper,  amounted to $455.4 million at February 29,
2000.  Based on  outstanding  borrowings  at quarter  end, a 10 percent  adverse
change in effective  market  interest rates at February 29, 2000 would result in
additional  annual after-tax  interest  expense of  approximately  $1.7 million.
Although a fluctuation  in interest rates would not affect  interest  expense or
cash flows  related to the $160 million  publicly  traded  notes,  the company's
primary  fixed-rate  debt, a 10 percent  increase in effective  market  interest
rates at  February  29,  2000 would  decrease  the fair value of these  notes to
approximately $134.4 million.

Foreign  Exchange  Rates-The  majority of the company's  revenue,  expense,  and
capital  purchases are  transacted  in U.S.  dollars.  International  operations
during the first half of fiscal 2000,  primarily in the lighting  equipment  and
chemical  segments,  represented  approximately 9.5 percent of sales and service
revenues,   4.5  percent  of  operating  profit  (loss),   and  8.4  percent  of
identifiable  assets.  The company does not believe a 10 percent  fluctuation in
average foreign  currency rates would have a material effect on its consolidated
financial statements or results of operations.

Cautionary Statement Regarding Forward-Looking Information

From time to time, the company may publish  forward-looking  statements relating
to such  matters  as  anticipated  financial  performance,  business  prospects,
capital expenditures,  technological  developments,  new products,  research and
development  activities,  and similar matters. The Private Securities Litigation
Reform  Act of 1995  provides  a safe  harbor  for  forward-looking  statements.
Statements  herein  which  may  be  considered   forward-looking   include:  (a)
statements  made regarding the company's  current  expectations  or beliefs with
respect  to  the  outcome  and  impact  on  the  company's  business,  financial
condition,  or results of  operations  of the Year 2000 Issue and  environmental
issues and (b) statements made regarding management's intentions or expectations
with regard to future  earnings,  projected  capital  expenditures,  future cash
flows,  debt  refinancing,   share  repurchases,   and  debt  to  capitalization
objectives.  A variety  of risks and  uncertainties  could  cause the  company's
actual results and experience to differ materially from the anticipated  results
or other expectations expressed in the company's forward-looking statements. The
risks and  uncertainties  include  without  limitation  the  following:  (a) the
uncertainty of general business and economic conditions, including the potential
for a slowdown in non-residential construction awards, fluctuations in commodity
and raw material prices,  market demand for public debt,  interest rate changes,
and foreign  currency  fluctuations;  and (b) the  ability to achieve  financing
objectives  and  strategic  initiatives,   including  but  not  limited  to  the
achievement of synergies  related to  acquisitions  and the achievement of sales
growth across the business segments through a combination of increased  pricing,
enhanced sales force, new products, improved customer service, and acquisitions.



                                                                         Page 13





                           PART II. OTHER INFORMATION


Item 6. Exhibits and Reports on Form 8-K

(a) Exhibits are listed on the Index to Exhibits (page 15).

(b) There were no reports on Form 8-K for the three  months  ended  February 29,
2000.





Page 14


                                   SIGNATURES



Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                            NATIONAL SERVICE INDUSTRIES, INC.
                                                       REGISTRANT


DATE  April 14, 2000                          /s/ KEN MURPHY
                                                       KEN MURPHY
                                                SENIOR VICE PRESIDENT AND
                                                     GENERAL COUNSEL



DATE  April 14, 2000                          /s/ BROCK HATTOX
                                                      BROCK HATTOX
                                              EXECUTIVE VICE PRESIDENT AND
                                                 CHIEF FINANCIAL OFFICER





                                                                         Page 15



                                                        INDEX TO EXHIBITS


                                                                                                           Page No.

                                                                                                     
EXHIBIT 10(iii)A           (1)    Nonemployee Directors' Stock Option Agreement Dated January 5, 2000      16
                                  between National Service Industries, Inc. and
                                  (a)   Leslie M. Baker, Jr.
                                  (b)   John L. Clendenin
                                  (c)   Thomas C. Gallagher
                                  (d)   Bernard Marcus
                                  (e)   Samuel A. Nunn
                                  (f)   Ray M. Robinson
                                  (g)   Herman J. Russell
                                  (h)   Betty L. Siegel
                                  (i)   Kathy Brittain White
                                  (j)   Barrie A. Wigmore
                                  (k)   Neil Williams

                           (2)    National Service Industries, Inc. Long-Term Achievement Incentive Plan   Reference is made to
                                  as Amended and Restated Effective as of January 5, 2000                  Exhibit A of registrant's
                                                                                                           Schedule 14A filed with
                                                                                                           the Commission on
                                                                                                           November 22, 1999, which
                                                                                                           is incorporated herein
                                                                                                           by reference.

                           (3)    Nonqualified Stock Option Agreement (Surrendered Aspiration Award)       21
                                  between National Service Industries, Inc. and:
                                  (a)   James S. Balloun
                                  (b)   Brock A. Hattox
                                  (c)   David Levy
                                  (d)   Stewart A. Searle III

                           (4)    Incentive Stock Option Agreement for Executive Officers  Effective       27
                                  Beginning  January 5, 2000 between National Service Industries, Inc.
                                  and:
                                  (a)   James S. Balloun
                                  (b)   George H. Gilmore, Jr.
                                  (c)   Brock A. Hattox
                                  (d)   David Levy
                                  (e)   Stewart A. Searle III

                           (5)    Nonqualified Stock Option Agreement for Executive Officers Effective     34
                                  Beginning January 5, 2000 between National Service Industries, Inc.
                                  and:
                                  (a)   James S. Balloun
                                  (b)   George H. Gilmore, Jr.
                                  (c)   Brock A. Hattox
                                  (d)   David Levy
                                  (e)   Stewart A. Searle III

EXHIBIT 27                        Financial Data Schedule                                                  40