UNITED STATES
                          SECURITIES AND EXCHANGE COMMISSION
                                 Washington, DC 20549


                                     SCHEDULE 13G

                       Under the Securities Exchange Act of 1934

                                  (Amendment No.  9)


                           Integrated Security Systems, Inc.
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                                   (Name of Issuer)

                                     Common Stock
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                            (Title of Class of Securities)

                                       45812J101
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                                    (CUSIP Number)









                                          13G
CUSIP No.  45812J101
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1.      NAME OF REPORTING PERSON         S.S. OR I.R.S. IDENTIFICATION NO.


        Renaissance Capital Growth and Income Fund III, Inc.    75-2533518
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2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
        (a)    [ ]
        (b)    [ ]
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3.      SEC USE ONLY

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4.      CITIZENSHIP OR PLACE OF ORGANIZATION
        Texas
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NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
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5.      SOLE VOTING POWER
        9,124,295 shares
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6.      SHARED VOTING POWER
        None
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7.      SOLE DISPOSITIVE POWER
        9,124,295 shares
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8.      SHARED DISPOSITIVE POWER
        None
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9.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
        9,124,295 shares
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10.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
        SHARES*
        Not applicable
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11.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
        45.84%
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12.     TYPE OF REPORTING PERSON
        IV
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ITEM 1.
        (a)Name of Issuer.
           Integrated Security Systems, Inc.                     ("Company")

        (b)Address of Issuer's principal Executive Offices
           8200 Springwood Drive, Suite 230
           Irving, TX 75063

ITEM 2.

        (a)Name of Person Filing
           Renaissance Capital Growth and Income Fund III, Inc.     ("Filer")

        (b)Address of principal Business Office or, if none, Residence
           8080 North Central Expwy., Suite 210, LB 59
           Dallas, TX 75206-1857

        (c)Citizenship
           Texas

        (d)Title of Class of Securities
           Common Stock

        (e)CUSIP Number
           75966V105

ITEM 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b),
        check whether the person filing is a:

        (a) ______  Broker or Dealer registered under Section 15 of the Act

        (b) ______  Bank as defined in section 3(a)(6) of the Act

        (c) ______  Insurance Company as defined in section 3(a)(19) of the Act

        (d)     X   Investment Company registered under section 8 of the
                    Investment Company Act
            ------

        (e) ______  Investment Adviser registered under section 203 of the
                    Investment Advisers Act of 1940

        (f) ______  Employee  Benefit  Plan,  Pension  Fund  which  is
                    subject  to  the  provisions  of the  Employee  Retirement
                    Income Security Act of 1974 or Endowment Fund; see section
                    240.13d-1(b)(1)(ii)(F)

        (g) ______  Parent Holding Company, in accordance with section
                    240.13d-1(b)(ii)(G)(Note: See Item 7)

        (h) ______  Group, in accordance with section 240.13d-1(b)(1)(ii)(H)






ITEM 4. Ownership.

        (a)Amount Beneficially Owned:
        As of April  1,  2001,  the  Filer  owned  8,374,295  shares  on a fully
        converted  basis.  On April 11, 2001, the Filer  purchased a $150,000 8%
        convertible promissory note, due and payable in 120 days and convertible
        at the  Filer's  option  into  common  stock of the Company at a rate of
        $0.20 per share.  Thus, the Filer owns 9,124,295 shares of the Company's
        common  stock on a fully  converted  basis.  The  Investment  Advisor is
        Renaissance  Capital Group,  Inc., which is also Investment  Manager for
        Renaissance  US Growth and Income Trust PLC.  Renaissance  US Growth and
        Income Trust PLC also owns  securities of Integrated  Security  Systems,
        Inc.

        (b)Percent of Class   45.84%

        (c)Number of shares as to which such person has:

           (i)   sole power to vote or to direct the vote:   9,124,295 shares
           (ii)  shared power to vote or to direct the vote:    None
           (iii) sole power to dispose or to direct the disposition of:
                 9,124,295 shares
           (iv)  shared power to dispose or to direct the disposition of: None

ITEM 5. Ownership of Five Percent or Less of a Class.

        If this  statement is being filed to report the fact that as of the date
hereof the reporting  person has ceased to be the beneficial  owner of more than
five percent of the class of securities, check the following: [ ]

ITEM 6. Ownership of More than Five Percent on Behalf of Another Person.

        Not applicable.

ITEM 7. Identification and Classification of the Subsidiary Which Acquired the
        Security Being Reported on By the Parent Holding Company.

        Not applicable.

ITEM 8. Identification and Classification of Members of the Group.

        Not applicable.

ITEM 9. Notice of Dissolution of Group.

        Not applicable.

ITEM 10.Certification.

        By signing below I certify that, to the best of my knowledge and belief,
the  securities  referred  to above  were  acquired  in the  ordinary  course of
business and were not acquired for the purpose of and do not have the effect of



changing or influencing  the control of the issuer of such  securities and were
not acquired in connection  with or as a participant in any transaction having
such purposes or effect.

SIGNATURE
        After  reasonable  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.

Date:      May 10, 2001                              /S/
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                                                          Signature
                                    Russell   Cleveland,   President   and   CEO
                                    Renaissance  Capital  Growth and Income Fund
                                    III, Inc.

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                                                          Name and Title