content: <PAGE>
   
                         SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C. 20549
  
                                      FORM 8-K
  
                              CURRENT REPORT PURSUANT
                           TO SECTION 13 OR 15(D) OF THE
                          SECURITIES EXCHANGE ACT OF 1934
  
  
  
  Date of Report (Date of earliest event reported)   July 21, 1997
                                                   --------------------------
  
                        OBJECTIVE SYSTEMS INTEGRATORS, INC.
  --------------------------------------------------------------------------------
             (Exact Name of the Registrant as Specified in Its Charter)
  
                                      Delaware
  --------------------------------------------------------------------------------
                   (State or Other Jurisdiction of Incorporation)
  
            000-26886                                      68-0239619
  --------------------------------------------------------------------------------
     (Commission File Number)                 (I.R.S. Employer Identification No.)
  
  
       100 Blue Ravine Road, Folsom, California                   95630 
  --------------------------------------------------------------------------------
       (Address of Principal Executive Offices)                 (Zip Code)
  
  
                                   (916) 353-2400
  --------------------------------------------------------------------------------
                (Registrant's Telephone Number, Including Area Code)
  
  
  --------------------------------------------------------------------------------
           (Former Name or Former Address, if Changed Since Last Report)
  <PAGE>
   
  Item 5.        Other Events.
                 ------------ 
  
         Objective Systems Integrators, Inc. (the "Company") sells its products
  throughout the world to customers primarily in the telecommunications industry.
  From time to time, certain of the Company's accounts receivable remain
  outstanding beyond their payment terms.  The Company performs periodic credit
  evaluations of its customers' financial condition and maintains an allowance for
  doubtful accounts receivable based upon the expected collectibility of all
  accounts receivable. During the three months ended June 30, 1997, the Company
  provided approximately $5.0 million additional reserves for doubtful accounts
  receivable, of which approximately $2.5 million was for the potential exposure
  of a single customer that is currently experiencing cash flow shortages.
  
         In addition, on July 21, 1997, the Company issued a press release
  announcing that revenues for the three months ended June 30, 1997 will be lower
  than had been expected at approximately $5.0 million and projecting a net loss
  for the quarter in the range of $14.0 million to $15.5 million or approximately
  $0.43 to $0.47 per share.  Further details regarding this announcement are
  contained in the Company's press release dated July 21, 1997 attached as an
  exhibit hereto and incorporated by reference herein.
  
  Item 7.    Financial Statements and Exhibits.
             --------------------------------- 
  
             (c) Exhibits
  
             EXHIBIT
             NUMBER             DESCRIPTION
             ------             -----------
  
             99.1               Press Release
  
                                        -2-
  <PAGE>
   
                                     SIGNATURES
  
         Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  
  Dated:  July 22, 1997
                                OBJECTIVE SYSTEMS INTEGRATORS, INC.
  
  
                                By: /s/ David M. Allen
                                    -----------------------------
                                    David M. Allen
                                    Vice President, Finance and 
                                    Administration and                
                                    Chief Financial Officer
  
                                        -3-
  <PAGE>
   
                                 INDEX TO EXHIBITS
  
  <TABLE> 
  <CAPTION> 
  
  
  Exhibit
  Number                 Exhibit Title
  ------                 -------------
  <C>                   <S> 
  99.1                   Press Release
  
  </TABLE> 
  
                                        -4-
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text: SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C. 20549
  
                                      FORM 8-K
  
                              CURRENT REPORT PURSUANT
                           TO SECTION 13 OR 15(D) OF THE
                          SECURITIES EXCHANGE ACT OF 1934
  
  Date of Report (Date of earliest event reported)   July 21, 1997
                                                   --------------------------
  
                        OBJECTIVE SYSTEMS INTEGRATORS, INC.
  --------------------------------------------------------------------------------
             (Exact Name of the Registrant as Specified in Its Charter)
  
                                      Delaware
  --------------------------------------------------------------------------------
                   (State or Other Jurisdiction of Incorporation)
  
            000-26886                                      68-0239619
  --------------------------------------------------------------------------------
     (Commission File Number)                 (I.R.S. Employer Identification No.)
  
       100 Blue Ravine Road, Folsom, California                   95630 
  --------------------------------------------------------------------------------
       (Address of Principal Executive Offices)                 (Zip Code)
  
                                   (916) 353-2400
  --------------------------------------------------------------------------------
                (Registrant's Telephone Number, Including Area Code)
  
  --------------------------------------------------------------------------------
           (Former Name or Former Address, if Changed Since Last Report)
  Item 5.        Other Events.
                 ------------ 
  
         Objective Systems Integrators, Inc. (the "Company") sells its products
  throughout the world to customers primarily in the telecommunications industry.
  From time to time, certain of the Company's accounts receivable remain
  outstanding beyond their payment terms.  The Company performs periodic credit
  evaluations of its customers' financial condition and maintains an allowance for
  doubtful accounts receivable based upon the expected collectibility of all
  accounts receivable. During the three months ended June 30, 1997, the Company
  provided approximately $5.0 million additional reserves for doubtful accounts
  receivable, of which approximately $2.5 million was for the potential exposure
  of a single customer that is currently experiencing cash flow shortages.
  
         In addition, on July 21, 1997, the Company issued a press release
  announcing that revenues for the three months ended June 30, 1997 will be lower
  than had been expected at approximately $5.0 million and projecting a net loss
  for the quarter in the range of $14.0 million to $15.5 million or approximately
  $0.43 to $0.47 per share.  Further details regarding this announcement are
  contained in the Company's press release dated July 21, 1997 attached as an
  exhibit hereto and incorporated by reference herein.
  
  Item 7.    Financial Statements and Exhibits.
             --------------------------------- 
  
             (c) Exhibits
  
             EXHIBIT
             NUMBER             DESCRIPTION
             ------             -----------
  
             99.1               Press Release
  
                                        -2-
  SIGNATURES
  
         Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  Dated:  July 22, 1997
                                OBJECTIVE SYSTEMS INTEGRATORS, INC.
  
                                By: /s/ David M. Allen
                                    -----------------------------
                                    David M. Allen
                                    Vice President, Finance and 
                                    Administration and                
                                    Chief Financial Officer
  
                                        -3-
  INDEX TO EXHIBITS
  Exhibit
  Number                 Exhibit Title
  ------                 -------------
  99.1                   Press Release
  -4-