SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                              -----------------------

                                  SCHEDULE TO/A

                  Tender Offer Statement Under Section 14(D)(1)

               Or 13(E)(1) of the Securities Exchange Act of 1934

                       (Amendment No. 2 - Final Amendment)

                         CSI COMPUTER SPECIALISTS, INC.

                            (Name of Subject Company)

                                              -----------------------

                            Interactive Systems, Inc.

                              Mr. Donald C. Weymer

                       (Name of Filing Person -- Offeror)

                    Common Stock, Par Value $0.001 Per Share

                        (Title of Classes of Securities)

                                                     12631103

                      (CUSIP Number of Class of Securities)

                                              -----------------------

                                Robert V. Windley

                         CSI Computer Specialists, Inc.

                         904 Wind River Lane, Suite 100

                          Gaithersburg, Maryland 63101

                                                  (301) 921-8860

          (Name, address and telephone number of person authorized to
                 receive notices and communications on behalf of
                          the person filing statement)

                             -----------------------

                                 With a copy to:

                Denise R. Brown, Esq.
                     Shaw Pittman

                 2300 N Street, N.W.
                 Washington, DC 20037

                    (202) 663-8000

                            CALCULATION OF FILING FEE

TRANSACTION VALUATION*                                    AMOUNT OF FILING FEE
     $2,520,888                                                   $504.18

   * Estimated for purposes of  calculating  the amount of filing fee only.  The
   amount  assumes the purchase of 2,520,888  shares of common stock,  par value
   $0.001 per share (the "Common Shares"),  at a price per Common Share of $1.00
   cash.  Such number of Common Shares  represents  the fully diluted  number of
   Common  Shares  outstanding  as of April 24, 2000,  less the number of Common
   Shares  already  beneficially  owned by Mr.  Donald  C.  Weymer,  Interactive
   Systems,  Inc.'s  Chief  Executive  Officer,  President,  a Director  and 98%
   shareholder.

       [X]  Check  box if any  part of the fee is  offset  as  provided  by Rule
       0-11(a)(2)  and  identify  the filing with which the  offsetting  fee was
       previously paid.  Identify the previous filing by registration  statement
       number, or the Form or Schedule and the date of its filing.

       Amount Previously Paid:  $504.18 Filing Party: Interactive Systems, Inc.
       Form or Registration No.:  Schedule TO  Date Filed:  April 26, 2000

       [  ]  Check  the  box  if  the  filing   relates  solely  to  preliminary
       communications made before the commencement of a tender offer.

       Check the appropriate  boxes below to designate any transactions to which
the statement relates:

       [X] third-party tender offer subject to Rule 14d-1.

       [ ]  issuer tender offer subject to Rule 13e-4.

       [ ]  going-private transaction subject to Rule 13e-3.

       [ ]  amendment to Schedule 13D under Rule 13d-2.

       Check the following box if the filing is a final  amendment  reporting
       the results of the tender offer:  [X]







                                                       - 4 -

This Amendment No. 2 (the "Final  Amendment")  amends and supplements the Tender
Offer  Statement on Schedule TO filed by Interactive  Systems,  Inc.  ("ISI") on
April 26,  2000,  as amended by Amendment  No. 1 filed by ISI and Mr.  Donald C.
Weymer on May 11, 2000 (as amended, the "Schedule TO"), relating to the offer by
ISI to purchase all of the outstanding  shares of Common Stock, par value $0.001
per  share  (the  "Common  Shares"),  of CSI  Computer  Specialists,  Inc.  (the
"Company") at a purchase  price of $1.00 per Common Share,  net to the seller in
cash (less any required  withholding  taxes),  upon the terms and subject to the
conditions set forth in the offer to purchase,  dated April 26, 2000 (the "Offer
to  Purchase")  and in  the  related  letter  of  transmittal  (the  "Letter  of
Transmittal,"  which,  together  with  the  Offer to  Purchase,  as  amended  or
supplemented from time to time, collectively constitute the "Offer"),  copies of
which were  previously  filed as Exhibits  (a)(1) and (a)(2) to the Schedule TO.
Capitalized  terms not defined herein have the meanings  assigned thereto in the
Schedule TO, including the Offer to Purchase.

ITEMS 1 THROUGH 9, 11 AND 13.

         Items 1 through 9, 11 and 13 of the Schedule TO, which are incorporated
by reference to the information  contained in the Offer to Purchase,  are hereby
amended as follows:

         The Offer expired at 5:00 p.m.,  Eastern  Time,  on Wednesday,  May 24,
2000.  Pursuant  to the Offer,  based on a report  from the  Depositary  for the
Offer,  ISI and Mr.  Donald C.  Weymer  accepted  for payment  2,313,616  Common
Shares.  This number,  together with the Common  Shares that Mr. Weymer  already
beneficially  owns,  represents  approximately  94%  of the  outstanding  Common
Shares.  On May 25, 2000, ISI and the Company issued a press release  announcing
the closing of the Offer.

         The full text of the May 25, 2000 press  release is attached  hereto as
Exhibit (a)(9) and incorporated herein by reference.

ITEM 12.  EXHIBITS.

       Item 12 is hereby amended and supplemented to include the following:

       (a)(9)     Text of press release jointly issued by ISI and the Company,
                  dated May 25, 2000.





                                                        SIGNATURE

After due inquiry and to the best of my knowledge and belief, I certify that the
information set forth in this statement is true, complete and correct.

                                 INTERACTIVE SYSTEMS, INC.

                                 By /s/ DONALD C. WEYMER

                                 Name:     Donald C. Weymer
                                 Title:   President and Chief Executive Officer

                                                    MR. DONALD C. WEYMER

                                                    /s/ DONALD C. WEYMER

Dated: May 25, 2000