INFONAUTICS INC
SC 13G, 1997-02-14
COMPUTER PROCESSING & DATA PREPARATION
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                                  UNITED STATES
                        SECURITIES & EXCHANGE COMMISSION
                              Washington D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                              (Amendment No.    )*


                                Infonautics, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                       Class A Common Stock, No Par Value
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    456662105
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


*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 the
disclosures provided in a prior cover page.

The information required in 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 ("Act") 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).

                                  Page 1 of 24

<PAGE>

CUSIP No. 456662105                     13G                   Page 2 of 24 Pages
- -------------------                                           ------------------

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

          21st Century Communications Partners, L.P.

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Delaware
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          572,600 shares                     6.0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             271,844 shares                     2.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         572,600 shares                     6.0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         271,844 shares                     2.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        PN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT

<PAGE>

CUSIP No. 456662105                     13G                   Page 3 of 24 Pages
- -------------------                                           ------------------

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

          21st Century Communications T-E Partners, L.P.

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Delaware
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          194,880 shares                     2.1%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             649,564 shares                     6.8%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         194,880 shares                     2.1%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         649,564 shares                     6.8%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        PN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 4 of 24 Pages
- -------------------                                           ------------------

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

          21st Century Communications Foreign Partners, L.P.

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       Delaware
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          76,964 shares                      0.8%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             767,480 shares                     8.1%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         76,964 shares                      0.8%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         767,480 shares                     8.1%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        PN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 5 of 24 Pages
- -------------------                                           ------------------

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

          Harvey Sandler

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 6 of 24 Pages
- -------------------                                           ------------------

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

          Barry Lewis

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 7 of 24 Pages
- -------------------                                           ------------------

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

          John Kornreich

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 8 of 24 Pages
- -------------------                                           ------------------

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

          Michael J. Marocco

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                   Page 9 of 24 Pages
- -------------------                                           ------------------

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

          Andrew Sandler

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                  Page 10 of 24 Pages
- -------------------                                          -------------------

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

          Barry Rubenstein

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                  Page 11 of 24 Pages
- -------------------                                          -------------------

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

          Irwin Lieber    

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

CUSIP No. 456662105                     13G                  Page 12 of 24 Pages
- -------------------                                          -------------------

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

          Barry Fingerhut

- --------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a) |_|
                                                             (b) |_|
- --------------------------------------------------------------------------------
  3    SEC USE ONLY


- --------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

       United States
- --------------------------------------------------------------------------------
                    
    NUMBER OF       5    SOLE VOTING POWER
      SHARES
   BENEFICIALLY          0 shares                             0%
     OWNED BY     --------------------------------------------------------------
       EACH         6    SHARED VOTING POWER                                    
    REPORTING                                                                   
      PERSON             844,444 shares                     8.9%
       WITH       --------------------------------------------------------------
                    7    SOLE DISPOSITIVE POWER                                 
                                                                                
                         0 shares                             0%
                  --------------------------------------------------------------
                    8    SHARED DISPOSITIVE POWER                               
                                                                                
                         844,444 shares                     8.9%
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 

        844,444 shares
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        8.9% 
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON*

        IN
- --------------------------------------------------------------------------------


                      * SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>

Item 1.

     (a)  Name of Issuer: Infonautics, Inc.

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

                          900 West Valley Road, Suite 1000
                          Wayne, Pennsylvania 19087

Item 2.

     1.   (a) Name of Person Filing: 21st Century Communications Partners, L.P.,
a limited partnership organized under the laws of the State of Delaware ("21st
Century").

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, New York 10153

          (c) Citizenship:   Not applicable.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          Sandler Investment Partners, L.P. ("SIP") and InfoMedia Associates,
Ltd. ("InfoMedia") are the general partners of 21st Century. The limited
partners of 21st Century include certain other investors.

     2.   (a) Name of Person Filing: 21st Century Communications T-E
Partners, L.P., a limited partnership organized under the laws of the State of
Delaware ("T-E").

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   Not applicable.

          (d) Title of Class of Securities: 

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.


                                  Page 13 of 24
<PAGE>

          SIP and InfoMedia are the general partners of T-E. The limited
partners of T-E include certain other investors.

     3.   (a) Name of Person Filing: 21st Century Communications Foreign
Partners, L.P., a limited partnership organized under the laws of the State of
Delaware ("Foreign").

          (b) Address of Principal Business Office, or, if none, Residence:

                             c/o Fiduciary Trust (Cayman) Limited
                             P.O. Box 1062
                             Grand Cayman, B.W.I.

          (c) Citizenship:   Not applicable.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

            SIP, 21st Century Management and InfoMedia are the general partners
of Foreign. The limited partners of Foreign include certain other investors.

     4.   (a) Name of Person Filing: Harvey Sandler, sole shareholder of 
                                     ARH Corp.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          ARH Corp. is a general partner of SCM, which is the general partner of
SIP, a general partner of 21st Century, T-E and Foreign.

     5.   (a) Name of Person Filing: Barry Lewis director and majority
shareholder of EMEBE Corp.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.


                                  Page 14 of 24

<PAGE>

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          EMEBE Corp. is a general partner of SCM, which is the general partner
of SIP, a general partner of 21st Century, T-E and Foreign.

     6.   (a) Name of Person Filing: John Kornreich, director and majority
shareholder of Four JK Corp.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          Four JK Corp. is a general partner of SCM, which is the general
partner of SIP, a general partner of 21st Century, T-E and Foreign.

     7.   (a) Name of Person Filing: Michael J. Marocco, director, officer and
sole shareholder of MJM Media Corp.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          MJM Media is a general partner of Sandler Capital Management ("SCM"), 
which is the general partner of SIP, a general partner of 21st Century, T-E and 
Foreign.

     8.   (a) Name of Person Filing: Andrew Sandler, a manager and majority
member of ALSI, LLC.

          (b) Address of Principal Business Office, or, if none, Residence:


                                  Page 15 of 24

<PAGE>

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          ALSI, LLC is a general partner of SCM, which is the general partner of
SIP, a general partner of 21st Century, T-E and Foreign.

     9. (a) Name of Person Filing: Barry Rubenstein, a shareholder, President
and director of InfoMedia.

          (b) Address of Principal Business Office, or, if none, Residence:

                             68 Wheatley Road
                             Brookville, NY 11545

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

            InfoMedia is a general partner of 21st Century, T-E and Foreign.

     10.  (a) Name of Person Filing: Irwin Lieber, a shareholder, Secretary and
Treasurer and director of InfoMedia.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          InfoMedia is a general partner of 21st Century, T-E and Foreign.


                                  Page 16 of 24

<PAGE>

     11.  (a) Name of Person Filing: Barry Fingerhut, a shareholder, Executive
Vice President and director of InfoMedia.

          (b) Address of Principal Business Office, or, if none, Residence:

                             767 Fifth Avenue.
                             New York, NY 10153

          (c) Citizenship:   United States.

          (d) Title of Class of Securities:

                             Class A Common Stock, no par value.

          (e) CUSIP Number:  456662105.

          InfoMedia is a general partner of 21st Century, T-E and Foreign.

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

                             Not Applicable.

     (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)  |_| 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 ss. 240.13d-1(b)(1)(ii)(F)

     (g)  |_| Parent Holding Company, in accordance with ss.240.13d-1(b)(ii)(G)
          (Note: See Item 7)

     (h)  |_| Group, in accordance with ss.240.13d-1(b)(1)(ii)(H)


                                  Page 17 of 24

<PAGE>

Item 4. Ownership.

1.   21st Century Communications Partners, L.P.:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 572,600 shares.
          (ii) shared power to vote or direct the vote: 271,844 shares.*
         (iii) sole power to dispose or direct the disposition of: 572,600
               shares.
          (iv) shared power to dispose or direct the disposition of: 271,844
               shares.*

2.   21st Century Communications T-E Partners, L.P.:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 194,880 shares.
          (ii) shared power to vote or direct the vote: 649,564 shares.*
         (iii) sole power to dispose or direct the disposition of: 194,880
               shares.
          (iv) shared power to dispose or direct the disposition of: 649,564
               shares.*

3.   21st Century Communications Foreign Partners, L.P.:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 76,964 shares.
          (ii) shared power to vote or direct the vote: 767,480 shares.*
         (iii) sole power to dispose or direct the disposition of: 76,964
               shares.
          (iv) shared power to dispose or direct the disposition of: 767,480
               shares.*

4.   Harvey Sandler :
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

- ----------

     *The reporting person discliams beneficial ownership of these securities
except to the extent of his/its equity interest therein.


                                  Page 18 of 24

<PAGE>

5.   Barry Lewis:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

6.   John Kornreich:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

7.   Michael J. Marocco:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

8.   Andrew Sandler:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

9.   Barry Rubenstein:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

10.  Irwin Lieber:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%


                                  Page 19 of 24

<PAGE>

     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

11.  Barry Fingerhut:
     (a)  Amount Beneficially Owned: 844,444 shares.
     (b)  Percent of Class: 8.9%
     (c)  Number of shares as to which such person has:
          (i)  sole power to vote or direct the vote: 0 shares.
          (ii) shared power to vote or direct the vote: 844,444 shares.*
         (iii) sole power to dispose or direct the disposition of: 0 shares.
          (iv) shared power to dispose or direct the disposition of: 844,444
               shares.*

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

                          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

                          Not Applicable.


                                  Page 20 of 24

<PAGE>

                                    SIGNATURE

     After reasonable inquiry and to the best of their knowledge and belief,
each of the undersigned hereby certifies that the information set forth in this
statement is true, complete and correct.

Date: January 31, 1997

                                21ST CENTURY COMMUNICATIONS PARTNERS, L.P.

                                     By: Sandler Investment Partners, L.P., 
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner


                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President


                                21ST CENTURY COMMUNICATIONS T-E PARTNERS, L.P.

                                     By: Sandler Investment Partners, L.P.,
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner


                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President

                                21ST CENTURY COMMUNICATIONS FOREIGN PARTNERS, 
                                L.P.
                                     By: Sandler Investment Partners, L.P.,
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner


                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President


                                  Page 21 of 24

<PAGE>

                                                      S/Michael J. Marocco
                                                 -------------------------------
                                                      Michael J. Marocco


                                                      S/Barry Lewis
                                                -------------------------------
                                                      Barry Lewis


                                                      S/John Kornreich
                                                 -------------------------------
                                                      John Kornreich


                                                      S/Harvey Sandler
                                                 -------------------------------
                                                      Harvey Sandler


                                                      S/Andrew Sandler
                                                 -------------------------------
                                                      Andrew Sandler


                                                      S/Barry Rubenstein
                                                 -------------------------------
                                                      Barry Rubenstein


                                                      S/Irwin Lieber
                                                 -------------------------------
                                                      Irwin Lieber


                                                      S/Barry Fingerhut
                                                 -------------------------------
                                                      Barry Fingerhut


Attention: Intentional misstatements or omissions of fact constitute Federal
           criminal violations (See 18 U.S.C. 1001)


                                  Page 22 of 24

<PAGE>

                             JOINT FILING AGREEMENT

     In accordance with Rule 13d-1(f) under the Securities Exchange Act, as
amended, the undersigned hereby agree to the joint filing on behalf of each of
them on a statement on Schedule 13G (including amendments thereto) with respect
to the Class A Common Stock, no par value per share, of Infonautics, Inc. and
that this Agreement be included as an Exhibit to such joint filing.

     IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this 31st
day of January, 1997.

                                21ST CENTURY COMMUNICATIONS PARTNERS, L.P.

                                     By: Sandler Investment Partners, L.P.,
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner

                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President

                                21ST CENTURY COMMUNICATIONS T-E PARTNERS, L.P.

                                     By: Sandler Investment Partners, L.P.,
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner


                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President


                                  Page 23 of 24

<PAGE>

                                21ST CENTURY COMMUNICATIONS FOREIGN PARTNERS, 
                                L.P.
                                     By: Sandler Investment Partners, L.P.,
                                         general partner
                                         By: Sandler Capital Management, general
                                             partner
                                             By: ARH Corp., general partner


                                             By: S/Harvey Sandler
                                                 -------------------------------
                                                 Name: Harvey Sandler
                                                 Title: President


                                                      S/Michael J. Marocco
                                                 -------------------------------
                                                      Michael J. Marocco


                                                      S/Barry Lewis
                                                -------------------------------
                                                      Barry Lewis


                                                      S/John Kornreich
                                                 -------------------------------
                                                      John Kornreich


                                                      S/Harvey Sandler
                                                 -------------------------------
                                                      Harvey Sandler


                                                      S/Andrew Sandler
                                                 -------------------------------
                                                      Andrew Sandler


                                                      S/Barry Rubenstein
                                                 -------------------------------
                                                      Barry Rubenstein


                                                      S/Irwin Lieber
                                                 -------------------------------
                                                      Irwin Lieber


                                                      S/Barry Fingerhut
                                                 -------------------------------
                                                      Barry Fingerhut


                                  Page 24 of 24



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