SECURITIES AND EXCHANGE COMMISSION
                                 Washington, DC 20549

                                     Schedule 13G
                                    (Rule 13d-102)

               INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
                      UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                  (Amendment No. 1)(1)

                                  USDATA Corporation
                                   (Name of Issuer)

                        Common Stock, $.01 par value per share
                            (Title of Class of Securities)

                                     917294 10 0
                                    (CUSIP Number)












(1)   The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 or otherwise subject to the liabilities of that section of the Act but
shall be subject to all other provisions of the Act (however, see the Notes).




CUSIP NO.     197294 10 0

1.  NAME OF REPORTING PERSON 
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

    Safeguard Scientifics, Inc. 23-1609753

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                 (a)  / x /   
                                                 (b)  /   /  
3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Pennsylvania

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

    5.   SOLE VOTING POWER

    6.   SHARED VOTING POWER                2,936,611
    
    7.   SOLE DISPOSITIVE POWER

    8.   SHARED DISPOSITIVE POWER      2,936,611

9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,936,611

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

    25.0%

12. TYPE OF REPORTING PERSON*

    CO




CUSIP NO.     197294 10 0

1.  NAME OF REPORTING PERSON 
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

    Safeguard Scientifics (Delaware), Inc. 51-0291171

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                 (a) / x /       
                                                 (b) /   /  
3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

    5.   SOLE VOTING POWER

    6.   SHARED VOTING POWER                2,936,611
    
    7.   SOLE DISPOSITIVE POWER

    8.   SHARED DISPOSITIVE POWER           2,936,611

9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,936,611

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* /  /

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

    25.0%

12. TYPE OF REPORTING PERSON*

    CO




Item 1 (a)    Name of Issuer:

USDATA Corporation

Item 1 (b)    Address of Issuer's Principal Executive Offices:

2435 North Central Expressway
Richardson, TX 75080

Item 2 (a)    Name of Person Filing:

(1)      Safeguard Scientifics, Inc.
(2)      Safeguard Scientifics (Delaware), Inc.

Item 2 (b)    Address of Principal Business Office:

(1) 800 The Safeguard Building
    435 Devon Park Drive
    Wayne, PA 19087-1945

(2) 103 Springer Building
    3411 Silverside Road
    Wilmington, DE 19803

Item 2 (c)    Citizenship:

(1) Pennsylvania
(2) Delaware

Item 2 (d)    Title of Class of Securities:

Common Stock, $.01 par value per share

Item 2 (e)    CUSIP Number:

917294 10 0

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

Not Applicable

Item 4        Ownership:

(a) Amount Beneficially Owned:

         2,936,611 (includes 698,238 currently exercisable warrants to purchase
         common stock)

(b) Percent of Class:   

    25.0%

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

    (i)    sole power to vote or to direct the vote:

           0






    (ii)   shared power to vote or to direct the vote:

           2,936,611

    (iii)  sole power to dispose or to direct the disposition of:

           0

    (iv)   shared power to dispose or to direct the disposition of:

           2,936,611

Safeguard Scientiifcs (Delaware), Inc, a wholly owned subsidiary of Safeguard
Scientifics, Inc.,. is the record holder of the shares reported herein as being
beneficially owned by Safeguard Scientiifcs, Inc.

Item 5        Ownership of Five Percent or Less of a Class:

Not applicable

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:

Safeguard Scientifics (Delaware), Inc., a Delaware corporation, is a wholly
owned subsidiary of Safeguard Scientifics, Inc..

Item 8        Identification and Classification of Members of the Group:

Safeguard Scientifics (Delaware), Inc. and Safeguard Scientifics, Inc. are
members of a group for purposes of Sections 13(d) and 13(g) of the Securities
Exchange Act of 1934. 

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
purpose 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. 
In executing this statement, the undersigned agrees, to the extent required by
Rule 13d-1(f), that this statement is being filed on behalf on each of the
Reporting Persons herein.

                             SAFEGUARD SCIENTIFICS, INC.



                             By: /s/ James A. Ounsworth
                                  James A. Ounsworth
                                  Sr. Vice President and General Counsel

Dated:  February 7, 1997


                             SAFEGUARD SCIENTIFICS (DELAWARE), INC.


                             By: /s/ James A. Ounsworth
                                  James A. Ounsworth
                                  Vice President 

Dated:  February 8, 1996