SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                            -------------------------

                                  SCHEDULE 13G
                                 (Rule 13d-102)

                    INFORMATION TO BE INCLUDED IN STATEMENTS
                  FILED PURSUANT TO RULES 13d-1(b), (c) AND (d)
                AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b)
                         (Amendment No. ____________)1

                                     CSP Inc

                                (Name of Issuer)

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

                                    126389105

                                 (CUSIP NUMBER)

                                  June 10, 2004

             (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                   / /     Rule 13d-1(b)
                  /X/      Rule 13d-1(c)
                  / /      Rule 13d-1(d)


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

     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).






--------------------------------------------------------------------------------
        NAME OF REPORTING PERSONS: Daniel Zeff
1.      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
--------------------------------------------------------------------------------
        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2.
                                                                      (a)     0
                                                                      (b)
--------------------------------------------------------------------------------
        SEC USE ONLY
3.
--------------------------------------------------------------------------------
        CITIZENSHIP OR PLACE OF ORGANIZATION        United States of America
4.
--------------------------------------------------------------------------------
      NUMBER OF             SOLE VOTING POWER
      SHARES              5.                                            178,558
   BENEFICIALLY
     OWNED BY
       EACH
     REPORTING
    PERSON WITH
--------------------------------------------------------------------------------
                          SHARED VOTING POWER                                 0
                    6.
--------------------------------------------------------------------------------
                          SOLE DISPOSITIVE POWER                        178,558
                    7.

--------------------------------------------------------------------------------
                          SHARED DISPOSITIVE POWER                            0
                    8.
--------------------------------------------------------------------------------
        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9.                                                                      178,558

--------------------------------------------------------------------------------
        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
10.     CERTAIN SHARES*
--------------------------------------------------------------------------------
        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)                  5.02%
11.
--------------------------------------------------------------------------------
        TYPE OF REPORTING PERSON*                                             IN
12.
--------------------------------------------------------------------------------

                      *SEE INSTRUCTION BEFORE FILLING OUT!




                                      -2-




Item 1(a).        Name of Issuer:

                         CSP Inc.

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

                         43 Manning Road, Billerica, Massachusetts 01821-3901


Item 2(a).        Name of Person Filing:

                         Daniel Zeff (the "Reporting Person")

Item 2(b).        Address of Principal Business Office or, if None, Residence:

                         The principal  business address of the Reporting Person
                         is:

                        c/o Zeff Holding Company, LLC
                        50 California Street, Suite 1500
                        San Francisco, CA 94111


Item 2(c).        Citizenship:

                         Mr. Zeff is a United States citizen.

Item 2(d).        Title of Class of Securities:

                         Common Stock, par value $.01

Item 2(e).        CUSIP Number:

                         126389105





                                      -3-



Item 3. If this  statement is filed  pursuant to Rule  13d-1(b),  or 13d-2(b) or
(c), check whether the person filing is a: Not Applicable

                  (a)      [ ] Broker or dealer  registered  under Section 15 of
                           the Exchange Act;

                  (b)      [ ]  Bank  as  defined  in  Section  3(a)(6)  of  the
                           Exchange Act;

                  (c)      [ ] Insurance  Company as defined in Section 3(a)(19)
                           of the Exchange Act;

                  (d)      [ ] Investment  Company registered under Section 8 of
                           the Investment Company Exchange Act;

                  (e)      [  ]  Investment  Adviser  in  accordance  with  Rule
                           13d-1(b)(1)(ii)(E);

                  (f)      [ ]  Employee  Benefit  Plan  or  Endowment  Fund  in
                           accordance with Rule 13d-1(b)(1)(ii)(F);

                  (g)      [ ] Parent  Holding  Company  or  Control  Person  in
                           accordance with Rule 13d-1(b)(1)(ii)(G);

                  (h)      [ ] Saving  Association as defined in Section 3(b) of
                           The Federal Deposit Insurance Act;

                  (i)      [ ] Church Plan that is excluded from the  definition
                           of an Investment  Company  under Section  3(c)(14) of
                           the Investment Company Act;

                  (j)      [    ]    Group,     in    accordance    with    Rule
                           13d-1(b)(1)(ii)(J).

Item 4.  Ownership.

    A.  Daniel Zeff

    (a)  Amount beneficially owned:                                    178,558
    (b)  Percent of Class:                                                5.02%
    (c)   Number of shares as to which such person has:

        (i)  Sole power to vote or direct the vote:                    178,558
        (ii) Shared power to vote or to direct the vote:                     0
        (iii)Sole power to dispose or direct the disposition of:       178,558
        (iv) Shared power to dispose or to direct the disposition of:        0


                         As  calculated  in  accordance  with Rule  13d-3 of the
                         Securities  Exchange  Act of 1934,  as amended,  Daniel
                         Zeff  beneficially  owns 178,558 shares of the Issuer's
                         Common  Stock,   par  value  $.01   ("Common   Stock"),




                                      -4-


                         representing  5.02% of the Common Stock.  Mr. Zeff does
                         not  directly  own any shares of Common  Stock,  but he
                         indirectly  owns 178,558  shares of Common Stock in his
                         capacity as the sole manager and member of Zeff Holding
                         Company,  LLC  a  Delaware  limited  liability  company
                         ("ZHC") which in turn serves as the general partner for
                         Zeff  Capital  Partners  I, L.P.  ("ZCP"),  a  Delaware
                         Limited    Partnership.    Mr.   Zeff   also   provides
                         discretionary  investment  management  services to Zeff
                         Capital  Offshore  Fund  ("ZCF"),  a class of shares of
                         Spectrum  Galaxy Fund Ltd., a company  incorporated  in
                         the British Virgin Islands.

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.

                           Each of ZCP and ZCF have the right to receive and the
                           power to direct the receipt of dividends from, and
                           the proceeds from the sale of, the shares of Common
                           Stock held by them.

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



                                      -5-



Item 10. Certification.

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that 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.

Dated:  June 17, 2004

                                                             /s/ Daniel Zeff
                                                             ---------------
                                                                 Daniel Zeff





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






                                      -6-