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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------


                                  SCHEDULE TO

                                 (RULE 14d-100)
           TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934


                               (AMENDMENT NO. 3)*

                            ------------------------
                          EXIGENT INTERNATIONAL, INC.
                       (NAME OF SUBJECT COMPANY (ISSUER))
                            ------------------------


                             MANATEE MERGER CORP.,

                          A WHOLLY OWNED SUBSIDIARY OF

                               HARRIS CORPORATION

                      (NAMES OF FILING PERSONS (OFFEROR))

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

                     COMMON STOCK, PAR VALUE $.01 PER SHARE
                           (INCLUDING THE ASSOCIATED
         SERIES B JUNIOR PARTICIPATING PREFERRED STOCK PURCHASE RIGHTS)
                         (TITLE OF CLASS OF SECURITIES)
                            ------------------------

                                   302056106
                     (CUSIP NUMBER OF CLASS OF SECURITIES)
                            ------------------------

                            SCOTT T. MIKUEN, ESQUIRE
                               HARRIS CORPORATION
                            1025 WEST NASA BOULEVARD
                            MELBOURNE, FLORIDA 32919
                                 (321) 727-9100
                 (NAME, ADDRESS AND TELEPHONE NUMBERS OF PERSON
 AUTHORIZED TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF FILING PERSONS)

                                    COPY TO
                           T. MALCOLM GRAHAM, ESQUIRE
                              HOLLAND & KNIGHT LLP
                         50 N. LAURA STREET, SUITE 3900
                          JACKSONVILLE, FLORIDA 32202
                                 (904) 353-2000
                            ------------------------
                           CALCULATION OF FILING FEE



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              TRANSACTION VALUATION*                              AMOUNT OF FILING FEE**
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                    $23,052,159                                          $4,610.43
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 * For purposes of calculating the filing fee pursuant to Rule 0-11(d), the
   Transaction Valuation was calculated on the basis of (i) 6,044,401
   outstanding shares of common stock, par value $.01 per share, of Exigent
   International, Inc. (the "Shares"), (ii) the tender offer price of $3.55 per
   Share, (iii) 15,132 shares of Class A Preferred Stock, par value $.01 per
   share, of Exigent International, Inc., which shares are convertible into
   Shares and have an aggregate value of $53,718, and (iv) 1,966,496 options to
   acquire Shares with an exercise price of less than $3.55 under Exigent
   International, Inc.'s (i) Incentive Stock Option Plan 1Q (Non-Qualified),
   (ii) Incentive Stock Option Plan 3Q, (iii) Incentive Stock Option Plan 4Q,
   (iv) Independent Directors Stock Option Plan (5NQ), (v) Stock Option Plan 6Q,
   and (vi) Exigent International, Inc. Omnibus Stock Option and Incentive Plan,
   with an aggregate value of $1,540,819. Based on the foregoing, the
   transaction value is equal to the sum of (1) the product of the number of
   outstanding Shares and $3.55 per Share, (2) the product of the number of
   outstanding shares of Class A Preferred Stock and $3.55 per share, and (3)
   the product of (A) 1,966,496 Shares which are subject to options to purchase
   Shares with an exercise price of less than $3.55 per share and (B) the
   difference between $3.55 per Share and the exercise price per Share of such
   options.

** The filing fee, calculated in accordance with Rule 0-11 of the Securities
   Exchange Act of 1934, is 1/50th of one percent of the aggregate Transaction
   Valuation.

[X] Check the 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: $4,610.43                            FILING PARTY: MANATEE MERGER CORP.
FORM OR REGISTRATION NO.: 005-53237                          DATE FILED: APRIL 17, 2001


[ ] 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 transaction 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]

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ITEM 1.  SUMMARY TERM SHEET.



ITEM 4.  TERMS OF THE TRANSACTION.



ITEM 8.  INTEREST IN SECURITIES OF THE SUBJECT COMPANY.



ITEM 11. ADDITIONAL INFORMATION.



     Items 1, 4, 8 and 11 of the Tender Offer Statement on Schedule TO filed
with the Securities and Exchange Commission on April 17, 2001 (as amended and
supplemented, the "Schedule TO") by Manatee Merger Corp., a Delaware Corporation
and a wholly owned subsidiary of Harris Corporation, a Delaware corporation,
hereby is amended and supplemented to add the following information:



     "The Offer expired at 12:00 midnight, New York City time, on Tuesday, May
     15, 2001. Based upon information provided by the Depositary to Harris, as
     of May 15, 2001, a total of at least 5,552,000 Shares, representing at
     least 91.6% of the outstanding Shares, have been validly tendered and not
     withdrawn pursuant to the Offer. Harris and the Offeror have accepted for
     prompt payment all Shares validly tendered pursuant to the Offer. On May
     16, 2001, Harris issued a press release announcing the expiration of the
     Offer. The full text of the Harris press release is attached hereto as
     Exhibit (a)(1)(k) and is incorporated herein by reference."


ITEM 12. EXHIBITS.


     Item 12 of the Schedule TO hereby is amended and supplemented to include
the following exhibit:




        
(a)(1)(k)  Press Release issued by Harris Corporation on May 16, 2001



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                                   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.


Dated: May 16, 2001


                                          HARRIS CORPORATION

                                          By: /s/ SCOTT T. MIKUEN
                                            ------------------------------------
                                            Scott T. Mikuen
                                            Corporate & Finance Counsel and
                                              Assistant Secretary

                                          MANATEE MERGER CORP.

                                          By: /s/ SCOTT T. MIKUEN
                                            ------------------------------------
                                            Scott T. Mikuen
                                            Assistant Secretary

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                                 EXHIBIT INDEX




EXHIBIT NO.                          DESCRIPTION
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(a)(1)(k)    Press Release issued by Harris Corporation on May 16, 2001



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