SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 11-K

(Mark One)

X ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
1934 [NO FEE REQUIRED] for the fiscal year ended December 29, 2001 or

_ TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
OF 1934 [NO FEE REQUIRED] for the transition period from __________ to
__________

COMMISSION FILE NUMBER 1-14989

A. Full title of the plan and address of the plan, if different from that
of the issuer named below:

WESCO DISTRIBUTION, INC. RETIREMENT SAVINGS PLAN

B. Name of issuer of the securities held pursuant to the plan and the
address of its principal executive offices:

WESCO INTERNATIONAL, Inc.
Commerce Court, Suite 700
Four Station Square
Pittsburgh, Pennsylvania 15219

WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
INDEX TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
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PAGE

Report of Independent Accountants 1

Financial Statements:

Statements of Net Assets Available for Benefits
December 29, 2001 and 2000 2

Statement of Changes in Net Assets Available for Benefits
Year Ended December 29, 2001 3

Notes to Financial Statements 4-8

Supplemental Schedule:

Schedule of Assets Held for Investment Purposes at End of Year
December 29, 2001 9-11

Exhibits 12

Signature 12

REPORT OF INDEPENDENT ACCOUNTANTS

To the Investment and Administrative Committees of
WESCO Distribution, Inc. Retirement Savings Plan

In our opinion, the accompanying statements of net assets available for benefits
and the related statement of changes in net assets available for benefits
present fairly, in all material respects, the net assets available for benefits
of the WESCO Distribution, Inc. Retirement Savings Plan (the Plan) at December
29, 2001 and 2000, and the changes in net assets available for benefits for the
year ended December 29, 2001 in conformity with accounting principles generally
accepted in the United States of America. These financial statements are the
responsibility of the Plan's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with auditing standards generally
accepted in the United States of America, which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by
management, and evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable basis for our opinion.

Our audits were conducted for the purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedule of assets held
for investment purposes is presented for the purpose of additional analysis and
is not a required part of the basic financial statements but is supplementary
information required by the Department of Labor's Rules and Regulations for
Reporting and Disclosure under the Employee Retirement Income Security Act of
1974. This supplemental schedule is the responsibility of the Plan's management.
The supplemental schedule has been subjected to the auditing procedures applied
in the audits of the basic financial statements and, in our opinion, is fairly
stated in all material respects in relation to the basic financial statements
taken as a whole.

/s/ PricewaterhouseCoopers LLP

Pittsburgh, Pennsylvania
June 7, 2002

WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
DECEMBER 29, 2001 AND 2000
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2001 2000

Investments (Notes 2 and 6) $217,692,266 $228,644,477

Receivables:
Employee contributions 474,098 899,567
Employer matching contributions 173,606 327,281
Accrued interest 21,067 50,556
------------ ------------

Net assets available for benefits $218,361,037 $229,921,881
============ ============

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

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
YEAR ENDED DECEMBER 29, 2001
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Additions:
Employee contributions $ 12,737,351
Employee rollovers 1,230,900
Employer contributions 2,520,366
------------

16,488,617

Interest and dividend income 540,713
------------

Total additions 17,029,330
------------

Deductions:
Distributions to withdrawing participants, at fair value 16,277,616
Net depreciation from registered investment companies 9,691,109
Net depreciation from common/collective trust funds 907,653
Net depreciation from stock funds and self-directed accounts 1,713,796
------------

Total deductions 28,590,174
------------

Net decrease 11,560,844

Net assets available for benefits, beginning of year 229,921,881
============

Net assets available for benefits, end of year $218,361,037
============

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

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
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1. MAJOR FEATURES OF THE PLAN

WESCO Distribution, Inc. Retirement Savings Plan (the Plan) was
established as of February 28, 1994 (date of inception). At the date of
inception, certain employees of the predecessor company became employees
of WESCO Distribution, Inc. (the Company) and participants in the Plan. At
the date of inception, all funds held by the prior plans related to the
transferred employees were transferred to the Plan.

The Plan covers the current employees of the Company and those former
employees with a fund balance of at least $5,000 who elected to maintain
their funds in the Plan. Former employees cannot make contributions to the
Plan.

The Plan is subject to the Employee Retirement Income Security Act of 1974
(ERISA). Under the Plan, participants may elect to make contributions on a
tax deferred basis in the form of a payroll deduction (Tax Deferred
Contributions) ranging from 1% up to the lesser of 15% of their
compensation or $10,500. In addition, employees may elect to make
contributions on an after-tax basis in the form of a payroll deduction
(After-Tax Contributions) ranging from 1% up to the lesser of 15% of their
compensation or $10,500. The $10,500 may be adjusted in future years by
the Internal Revenue Service. The sum of the Tax Deferred Contributions
and the After-Tax Contributions cannot exceed 15% of the participant's
compensation. Subject to limitation, the Company will make contributions
(Regular Company Contributions) in an amount equal to 50% of a
participant's total monthly contributions up to a maximum of 6%. In
addition, the Company may, at the Board of Directors' discretion, make a
profit sharing contribution (Company Profit Sharing Contribution) to the
Plan provided certain predetermined profit levels are attained. The
Company did not make a Profit Sharing Contribution for the year ended
December 29, 2001.

Participants are fully vested in the value of their contributions and
related investment income at all times and vest in their allocated share
of employer contributions according to the following schedule:

Less than three years of service 0%
Three years of service 33%
Four years of service 66%
Five or more years of service 100%

In conjunction with a leveraged recapitalization of the Company all active
employees as of June 5, 1998 became fully vested.

Employer contributions forfeited by participants not vested at their
termination date are used to reinstate previously forfeited account
balances of former participants who have returned to employment with the
Company, or to reduce employer contributions in accordance with the plan
document. Total forfeitures that reduced employer contributions in 2001
were approximately $2,022,000.

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
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Ten options were available for investment of contributions to the Plan as
of December 29, 2001. A brief description of the investment options is as
follows:

FUND DESCRIPTION

American Express Trust Income Fixed income fund that invests
Fund II exclusively in American Express Trust
Income Fund I, which invests in a
diversified pool of insurance and
bank investment contracts and book
value investment contracts of varying
maturity size and yield to preserve
principal and income

American Express Trust Equity Index Diversified corporate stock fund that
Fund I seeks to achieve a return as close
as possible to the Standard and
Poor's 500 Stock Index

AXP Selective Fund Investment grade bond fund that seeks
current income and preservation of
capital

American Balanced Fund Broadly diversified fund that invests
in securities and bonds for the
preservation of capital, current
income and long-term growth of
capital and income

AXP New Dimension Fund Common stock fund that seeks
companies showing potential for
significant growth for long-term
growth of capital

PIMCO Opportunity Fund Common stock fund that seeks
companies with small equity
capitalization to achieve capital
appreciation

Templeton Foreign Fund Aggressive long-term capital growth
fund that invests in common stocks of
companies outside the United States

American Century Value Fund Long-term capital growth fund that
invests in securities that its
management believes are undervalued
at the time

WESCO International Stock Fund Fund that invests in the stock of
WESCO International, Inc.

Self-Directed Brokerage Account Account that provides participants
access to a wide range of common
stocks and mutual funds beyond those
available through the Plan.

In addition, participant account balances transferred from the prior plans
may remain invested in the Viacom (formerly CBS Corporation) Pooled Stock
Fund, although no future contributions may be invested in the Viacom
Pooled Stock Fund. Investment income earned by the Viacom Pooled Stock
Fund is invested in the American Express Trust Income Fund II in
accordance with the plan document. As a result of the initial public
offering of WESCO International, Inc., participants were also given the
option to invest in the WESCO International Stock Fund effective July 1,
1999.

An account is maintained for each participant, which is credited with the
participant's contributions and an allocation of Company contributions and
plan earnings. Allocations are based on participant contributions or
account balances, as defined by the Plan. The benefit to which a
participant is entitled is the benefit that can be provided from that
participant's account.

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
- --------------------------------------------------------------------------------

The Investment Committee and the Administrative Committee of the Company's
Board of Directors administer the Plan. Reference should be made to the
Prospectus, "What Does Your Future Hold?", for additional information on
the Plan.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

ACCOUNTING PRINCIPLES
The financial statements of the Plan have been prepared in accordance with
accounting principles generally accepted in the United States of America.
The following are the significant accounting policies followed by the
Plan:

BASIS OF ACCOUNTING
The accounting records of the Plan are maintained on the accrual basis of
accounting.

INVESTMENT VALUATION AND INCOME RECOGNITION
Investments are carried at fair value in the accompanying financial
statements. Investments in registered investment companies,
common/collective trust funds and common stocks are valued by the trustee
based on market values of all assets in the funds' securities portfolio
and the number of units in the funds owned by the Plan. Investments in the
Viacom Pooled Stock Fund and WESCO International Stock Fund are valued at
quoted market prices. Participant loans are valued at cost which
approximates fair value.

Purchases and sales of securities are recorded on a settlement date basis.
Dividends are recorded on the ex-dividend date.

NET APPRECIATION (DEPRECIATION) IN VALUE OF INVESTMENTS
The Plan presents in the statement of changes in net assets available for
benefits the net appreciation (depreciation) in the fair value of its
investments, which consists of the realized gains (losses) and the
unrealized appreciation (depreciation) in common/collective trusts,
registered investment companies, Viacom and WESCO International stock and
other common stocks.

USE OF ESTIMATES
The preparation of financial statements in conformity with accounting
principles generally accepted in the United States of America requires
management to make significant estimates and assumptions. These may affect
the reported amounts of assets and liabilities and the disclosure of
contingent assets and liabilities at the date of the financial statements
and the reported amounts of additions and deductions during the reporting
period. Actual results could differ from those estimates.

RISKS AND UNCERTAINTIES
The Plan provides for various investment options in any combination of
stocks, bonds, fixed income securities and other investment securities.
Investment securities are exposed to various risks, such as interest rate,
market and credit. Due to the level of risk associated with certain
investment securities and the level of uncertainty related to changes in
the value of investment securities, it is at least reasonably possible
that changes in the near-term could materially affect participants'
account balances and the amounts reported in the statements of net assets
available for benefits and the statement of changes in net assets
available for benefits.

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
- --------------------------------------------------------------------------------

OTHER
Administrative expenses, excluding participant loan setup fees,
distribution fees and hardship withdrawal fees, are paid by the Company
and, therefore, are not expenses of the Plan.

Benefits are recorded when paid.

3. TAX STATUS

The Internal Revenue Service has ruled that the Plan qualifies under
Section 401(a) of the Internal Revenue Code and, therefore, is exempt from
federal income taxes under provisions of Section 501(a). Accordingly, no
provision for income taxes has been included in the Plan's financial
statements.

4. EMPLOYEE LOANS

Participants are permitted to borrow against a portion of their vested
account balance within the prescribed limitations and pursuant to
nondiscriminatory rules established by the Administrative Committee. Each
loan is to be repaid over a period not to exceed five years.

The interest rate applied to employee loans is established each month by
the Administrative Committee at 1% above the PNC Bank prime interest rate.
The interest rate on new loans ranged between 6.0% and 10.5% for the
period December 30, 2000 to December 29, 2001. Principal and interest
payments are generally made through monthly payroll deductions and are
credited to the participant's individual account. Loans of approximately
$2,506,000 were made from the Plan and loan principal repayments of
approximately $3,534,000 were received by the Plan for the year ended
December 29, 2001. Interest of approximately $570,000 was received by the
Plan for the year ended December 29, 2001 related to employee loans.

5. PLAN TERMINATION

Although the Company has not expressed any intent to do so, it has the
right under the Plan to discontinue its contributions at any time and to
terminate the Plan subject to the provisions of ERISA. In the event the
Plan terminates, participants will become 100% vested in their accounts.

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 29, 2001 AND 2000
- --------------------------------------------------------------------------------

6. INVESTMENTS

Investments representing 5% or more of the net assets available for
benefits as of December 29, 2001 and 2000 were as follows:

2001 2000

American Express Trust Income Fund II $55,526,062 $52,261,139
American Express Trust Equity Index Fund I 30,435,480 36,682,066
American Balanced Fund 23,810,287 19,356,693
AXP New Dimension Fund 49,893,506 63,185,416
PIMCO Opportunity Fund 15,655,044 19,277,807

7. RELATED PARTY TRANSACTIONS

Certain investments of the Plan are mutual funds managed by American
Express. The trustee of the Plan is American Express Trust Company and,
therefore, these transactions qualify as party-in-interest transactions.

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WESCO DISTRIBUTION, INC.
RETIREMENT SAVINGS PLAN
SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES AT END OF YEAR
EIN 25-1723345, PLAN NUMBER 001
DECEMBER 29, 2001
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FAIR
ISSUER DESCRIPTION VALUE

American Express Trust American Express Trust Income
Company* Fund II $ 55,526,062
American Express Trust American Express Trust Equity
Company* Index Fund I 30,435,480
American Express Financial* AXP Selective Fund 7,303,117
American Funds American Balanced Fund 23,810,287
American Express Financial* AXP New Dimension Fund 49,893,506
PIMCO Funds PIMCO Opportunity Fund 15,655,044
Templeton Group Templeton Foreign Fund 5,939,500
American Century Investments American Century Value Fund 9,012,758
Viacom Viacom Pooled Stock Fund 9,720,511
WESCO International, Inc.* WESCO International Stock Fund 3,795,391
Participant Loans* 6.0% - 10.5%, due at various dates 5,829,874
Global Crossing Ltd. Common Stock 2,889
Creative Technology Common Stock 740
AES Corp. Common Stock 4,378
AOL Time Warner Inc. Common Stock 3,350
Adobe Systems Inc. Common Stock 3,208
Advanced Micro Devices, Inc. Common Stock 16,530
Altera Corp. Common Stock 2,276
Amazon Com Inc. Common Stock 747
American Eagle Outfitters, Inc. Common Stock 11,731
Andrea Electronics Corp. Common Stock 690
Applied Materials, Inc. Common Stock 5,564
Aquila Inc. Common Stock -
Ariba Inc. Common Stock 856
Art Technology Inc. Common Stock 320
Artemis Intl Solutions Corp. Common Stock 46
Big Dog Holdings Inc. Common Stock 301
Boeing Co. Common Stock 1,404
CTS Corp. Common Stock 1,500
Callaway Golf Co. Common Stock 798
Calpine Corp. Common Stock 7,330
Cisco Systems Inc. Common Stock 2,453
Comfort Systems USA, Inc. Common Stock 340
Comdisco Inc. Common Stock 740
Corning Inc. Common Stock 5,130
DCH Technology Inc. Common Stock 260
Dell Computer Corp. Common Stock 4,748
Walt Disney Co. Common Stock 3,071

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FAIR
ISSUER DESCRIPTION VALUE

Docent Inc. Common Stock $ 2,170
Enron Corp. Common Stock 260
Erickson LM Telephone Co. Common Stock 546
Ford Motor Co. Common Stock 1,894
Genetech Inc. Common Stock 3,447
General Motors Common Stock 1,740
Genetronics Biomedical Ltd. Common Stock 4,860
Home Depot Inc. Common Stock 6,998
ICN Pharmaceuticals, Inc. Common Stock 2,978
Immunex Corp. Common Stock 2,700
Intel Corp. Common Stock 9,798
Interliant Inc. Common Stock 43
JDS Uniphase Corp. Common Stock 20,160
Johnson & Johnson Common Stock 11,650
Kaire Holdings Inc. Common Stock 24
Krispy Kreme Doughnuts Inc. Common Stock 7,450
LTV Corp. Common Stock 82
LSI Logic Corp. Common Stock 2,844
LA Quinta Corp. Common Stock 59,267
MTR Gaming Group Inc. Common Stock 542
Medical Action Industries, Inc. Common Stock 5,250
Metal Clad Corp. Common Stock 235
Metro One Telecommunications, Inc. Common Stock 860
Motorola Inc. Common Stock 3,143
Nisource Inc. Common Stock 209
Nokia Corp. Common Stock 5,753
Nortel Networks Corp. Common Stock 304
Novatel Wireless, Inc. Common Stock 1,440
N2H2 Inc. Common Stock 41
Oracle Corp. Common Stock 37,404
Owens Corning Comm Common Stock 835
Paychex Inc. Common Stock 5,252
Photoworks, Inc. Common Stock 12
Polymedica Corp. Common Stock 9,200
PurchasePro.Com Inc. Common Stock 75
Quadramed Corporation Common Stock 1,079

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FAIR
ISSUER DESCRIPTION VALUE

RSA Sec Inc. Common Stock $ 1,575
Radio Shack Corporation Common Stock 2,896
Remington Oil & Gas Corp. Common Stock 3,258
Savvis Communications Corp. Common Stock 66
Starrett L S Company Common Stock 970
Sun Microsystems Inc. Common Stock 712
Taiwan Semiconductor
Manufacturing Co. Common Stock 6,499
Take-2 Interactive Sft. Common Stock 1,394
Tellabs Inc. Common Stock 2,292
Telular Corp. Common Stock 2,820
Texas Instruments Inc. Common Stock 3,205
Triquint Semiconductor Inc. Common Stock 3,975
USG Corporation Common Stock 1,024
United Energy Corp. Common Stock 9,125
USAIR Group Common Stock 4,120
Uromed Corp. Common Stock 74
View Systems Inc. Common Stock -
Wal-Mart Stores Inc. Common Stock 5,515
Artisan Partners Artisan International Investor Shares 8,524
Artisan Partners Artisan Mid Cap Fund (Investor Shares) 22,977
Fremont Funds Fremont Mutual Funds Inc. 26,229
Harbor Fund Harbor Capital Appreciation Fund 58,331
The Oakmark Family of Funds Oakmark Equity and Income Fund (1) 4,924
PIMCO Funds PIMCO FDS Multi Manager Ser. 5,117
Dresdner RCM Global Investors RCM Global Health D. 5,178
Potomac Funds Potomac Funds 51,541
The Reserve Funds Reserve Fund Inc. CL A 199,283
The Selected Fund Selected American Shares Inc. 31,957
Third Avenue Funds Third Ave Tr. 2,914
Thompson Plumb and Associates Thompson Plumb Funds Inc. 5,502
Weitz Funds Weitz Partners Value Fund 3,896
Weitz Funds Weitz Ser. Fund Inc. 2,898
-------------

Total $ 217,692,266
=============

*Denotes party-in-interest.

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EXHIBITS

The following exhibits are filed or incorporated as part of this report:

Exhibit
Number Description
------- -----------
23.01 Consent of PricewaterhouseCoopers LLP (filed herewith)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Administrative Committee for the WESCO Distribution, Inc. Retirement
Savings Plan has duly caused this annual report to be signed on its behalf
by the undersigned thereunto duly authorized.

WESCO DISTRIBUTION, INC.
RESTIREMENT SAVINGS PLAN

Date: June 25, 2002 By: /s/ Stephen A. Van Oss
---------------- ---------------------------------

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