**ITOP CONTRACTORS/SUBCONTRACTORS - [ISE]{.underline} (page 1 of 3)**

+-------------------------+---------------------------------+---------+
| **PRIME CONTRACTORS**   | **SUBCONTRACTORS**              | *       |
|                         |                                 | *TYPE** |
+-------------------------+---------------------------------+---------+
| **Advanced Management   | Acton Burnell\                  | Small\  |
| Technology, Inc.**      | ANDRULIS Corporation\           | Small,  |
|                         | Keane Federal Systems, Inc.\    | WO\     |
| **8(a), WO\             | Mitchell Systems Corporation\   | Large\  |
| DTTS59-99-D-00437**     | Strategic Business Solutions,   | Small,  |
|                         | Inc.\                           | WO\     |
|                         | Strictly Business Computer      | SDB,    |
|                         | Systems\                        | WO\     |
|                         | Structured Solutions, Inc.\     | Small\  |
|                         | VISTA Computer Services, Inc.\  | Small,  |
|                         | Wizdom Systems, Inc.\           | WO\     |
|                         | World Wide Technology, Inc.     | SDB\    |
|                         |                                 | Small\  |
|                         |                                 | SDB     |
+-------------------------+---------------------------------+---------+
| **Anteon Corporation**  | BTG\                            | Large\  |
|                         | CACI International, Inc.\       | Large\  |
| **Large\                | Caliber Associates\             | Small\  |
| DTTS59-99-D-00442**     | HJ Ford Associates, Inc.\       | SDB\    |
|                         | KENROB and Associates, Inc.\    | SDB\    |
|                         | The Marasco Newton Group, Ltd.\ | Large\  |
|                         | Multimax\                       | SDB\    |
|                         | Troy Systems, Inc.\             | Large\  |
|                         | TYBRIN Corporation              | Small   |
+-------------------------+---------------------------------+---------+
| **Catapult Technology,  | Aero Tech Service Associates,   | SDB\    |
| Ltd.**                  | Inc.\                           | 8a\     |
|                         | ASF Systems, Inc.\              | Small,  |
| **Small\                | A&T Networks, Inc.\             | WO\     |
| DTTS59-99-D-00441**     | Cameron Consulting\             | SDB\    |
|                         | Houston Associates, Inc.\       | Small\  |
|                         | IBM\                            | Large\  |
|                         | Metamor\                        | Large\  |
|                         | Preferred Systems Solutions,    | SDB\    |
|                         | Inc.\                           | SDB\    |
|                         | Pulsar Data Systems\            | Small\  |
|                         | RABA Technologies\              | Large\  |
|                         | SFA, Inc.\                      | Large\  |
|                         | Statistica, Inc.\               | Small\  |
|                         | Trident Systems, Inc.\          | Large\  |
|                         | Validity/Titan Corporation\     | Small   |
|                         | WT Chen & Company, Inc.         |         |
+-------------------------+---------------------------------+---------+
| **Computer Resource     | APEX Technology, Inc.\          | SDB\    |
| Management, Inc.**      | Applied Research Associates,    | Large\  |
|                         | Inc.\                           | Small\  |
| **Small\                | Architecture Technology         | SDB,    |
| DTTS59-99-D-00439**     | Corporation\                    | WO\     |
|                         | Computer System Technology,     | SDB\    |
|                         | Inc.\                           | SDB,    |
|                         | Datacom Services, Inc.\         | WO\     |
|                         | DUCOM, Inc.\                    | SDB\    |
|                         | Eastern Computers, Inc.\        | SDB\    |
|                         | Force 3, Inc.\                  | SDB\    |
|                         | Integrated Information          | Small\  |
|                         | Technology Corp.\               | \       |
|                         | Johnston McLamb CASE Solutions, | Large\  |
|                         | Inc JMCS\                       | Small,  |
|                         | PRT Group, Inc.\                | WO\     |
|                         | Reliable Integration Services,  | SDB     |
|                         | Inc.\                           |         |
|                         | Telecom Solutions, Inc.         |         |
+-------------------------+---------------------------------+---------+
| **Datamat Systems       | Abelia Corporation\             | Small\  |
| Research, Inc.**        | Concurrent Technologies         | Small\  |
|                         | Corporation\                    | Large\  |
| **8(a)**                | Decision Systems Technologies,  | SDB\    |
|                         | Inc.\                           | SDB,    |
| **DTTS59-99-D-00435**   | JIL Information Systems\        | WO\     |
|                         | Research Dynamics, Inc.\        | Small   |
|                         | Template Software, Inc.         |         |
+-------------------------+---------------------------------+---------+

** **

ITOP CONTRACTORS/SUBCONTRACTORS - ISE (page 2 of 3)

+-------------------------+---------------------------------+---------+
| **PRIME CONTRACTORS**   | **SUBCONTRACTORS**              | *       |
|                         |                                 | *TYPE** |
+-------------------------+---------------------------------+---------+
| **FC Business Systems,  | AERA\                           | Small\  |
| Inc.\                   | AVANCO\                         | Small\  |
| \                       | Canal Bridge\                   | Small,  |
| Small\                  | DCC\                            | WO\     |
| DTTS59-99-D-00440**     | DMR\                            | SDB\    |
|                         | Hi-Tec\                         | Large\  |
|                         | NEWLINK\                        | SDB\    |
|                         | Don O\'Neill\                   | SDB\    |
|                         | PowerTrain\                     | Small\  |
|                         | SHERIKON\                       | Small\  |
|                         | Vector Research\                | Small,  |
|                         | VISI\                           | WO\     |
|                         | Vitronics                       | Small\  |
|                         |                                 | Small\  |
|                         |                                 | SDB\    |
|                         |                                 | Small   |
+-------------------------+---------------------------------+---------+
| **GTE Government        | Advanced Systems Development    | Small\  |
| Systems, Inc.**         | (ASD)\                          | Large\  |
|                         | Computer Associates             | Large\  |
| **Large\                | International, Inc.\            | Small,  |
| DTTS59-99-D-00443**     | Electronic Data Systems, Inc.   | WO\     |
|                         | (EDS)\                          | SDB\    |
|                         | FCI\                            | Large\  |
|                         | GeoLogics\                      | SDB\    |
|                         | Intermetrics, Inc.\             | Large   |
|                         | RS Information Systems\         |         |
|                         | System Resources Corporation    |         |
|                         | (SRC)                           |         |
+-------------------------+---------------------------------+---------+
| **Performance           | Automated Systems and           | Small\  |
| Engineering             | Programming, Inc. (ASPI)\       | \       |
| Corporation**           | Collins Consulting Group (CCG)\ | Small\  |
|                         | Open Network Solutions, Inc.    | Small\  |
| **Small\                | (ONS)\                          | SDB\    |
| DTTS59-99-D-00438**     | Sabre Systems, Inc.\            | SDB     |
|                         | Scientific Systems & Software   |         |
|                         | International Corp.(SSSI)       |         |
+-------------------------+---------------------------------+---------+
| **Science Applications  | Abacus Technology Corporation\  | SDB\    |
| International           | Adsystech, Inc.\                | SDB\    |
| Corporation (SAIC)**    | Cherokee Information Services,  | SDB\    |
|                         | Inc.\                           | SDB\    |
| **Large\                | CTG, Inc.\                      | SDB\    |
| DTTS59-99-D-00444**     | Forte Systems\                  | Small,  |
|                         | GroupWare Technologies, Inc.\   | WO\     |
|                         | Infotech Enterprises, Inc.\     | SDB\    |
|                         | INDUS Corp.\                    | SDB\    |
|                         | Intellisys Technology Corp.\    | SDB\    |
|                         | Leads Corporation\              | Small\  |
|                         | LSA, Inc.\                      | SDB\    |
|                         | Metron, Inc.\                   | Small\  |
|                         | Northern NEF, Inc.\             | SDB\    |
|                         | RA-Tech, Inc.\                  | SDB\    |
|                         | Scientific Consulting &         | SDB,    |
|                         | Automated Technological         | WO\     |
|                         | Services, Inc. (Scats, Inc.)\   | \       |
|                         | Symbiont, Inc.                  | SDB     |
+-------------------------+---------------------------------+---------+
| **Signal Corporation**  | Boeing Information Services,    | Large\  |
|                         | Inc.\                           | Small\  |
| **Large**               | D. Appleton Company, Inc.       | SDB\    |
|                         | (Dacom)\                        | Large\  |
| **DTTS59-99-D-00445**   | Dimensions International, Inc.  | \       |
|                         | (DII)\                          | Large   |
|                         | Dynamics Research Company, Inc. |         |
|                         | (DRC)\                          |         |
|                         | Price Waterhouse LLP (PwC)      |         |
+-------------------------+---------------------------------+---------+
| **SRA International,    | ANSTEC\                         | SDB\    |
| Inc.\                   | COMTek\                         | SDB\    |
| \                       | Ellsworth Associates\           | Small,  |
| Large\                  | Erekson and Associates\         | WO\     |
| DTTS59-99-D-00446**     | MSD                             | Small\  |
|                         |                                 | Small   |
+-------------------------+---------------------------------+---------+

** **

ITOP CONTRACTORS/SUBCONTRACTORS - ISE (page 3 of 3)

+-------------------------+----------------------------------+---------+
| **PRIME CONTRACTORS**   | **SUBCONTRACTORS**               | *       |
|                         |                                  | *TYPE** |
+-------------------------+----------------------------------+---------+
| **Stanley Associates,   | Applied Management Systems\      | Small\  |
| Inc.\                   | CIBER Corporation\               | Large\  |
| \                       | Computer Based Systems,          | Large\  |
| Large\                  | Inc.(CBSI)\                      | Large\  |
| DTTS59-99-D-00447**     | Digicon Corporation\             | Small\  |
|                         | FGM, Inc.\                       | Large\  |
| ** **                   | GRC International\               | Large\  |
|                         | Harris Corporation\              | SDB,WO\ |
| ** **                   | IMSI\                            | Small\  |
|                         | J.G. Van Dyke & Associates\      | Large\  |
|                         | ManTech\                         | SDB\    |
|                         | Technautics\                     | SDB     |
|                         | Visitronix                       |         |
+-------------------------+----------------------------------+---------+
| **The Centech Group,    | ALTA Systems, Inc.\              | SDB,WO\ |
| Inc.\                   | Century Computing, Inc.\         | Small\  |
| \                       | LEX Solutions, Inc.\             | SDB\    |
| 8(a)\                   | Per-Se Technologies\             | Large\  |
| DTTS59-99-D-00436**     | Solutions by Design, Inc.\       | Small\  |
|                         | Teledyne Brown Engineering       | Large   |
+-------------------------+----------------------------------+---------+
| **Unisys Corporation\   | Cambridge Systematics, Inc.\     | Small\  |
| \                       | Century Technologies, Inc.\      | SDB\    |
| Large\                  | CGH Technologies, Inc.\          | Sm      |
| DTTS59-99-D-00 448**    | DSD Laboratories, Inc.\          | all,WO\ |
|                         | HTE-UCS, Inc.\                   | Small\  |
|                         | KMPH Peat Marwick LLP\           | Large\  |
|                         | Marconi/QSI (Tracor)\            | Large\  |
|                         | MRJ Technology Solutions\        | Large\  |
|                         | United Information Systems, Inc. | Large\  |
|                         | (UIS)                            | Small   |
+-------------------------+----------------------------------+---------+

ITOP CONTRACTORS/SUBCONTRACTORS - SOM (page 1 of 3)

+------------------------+----------------------------------+---------+
| **PRIME CONTRACTORS**  | **SUBCONTRACTORS**               | *       |
|                        |                                  | *TYPE** |
+------------------------+----------------------------------+---------+
| **Advanced Management  | ANDRULIS Corporation\            | Sm      |
| Technology, Inc.**     | ARTEL, Inc.\                     | all,WO\ |
|                        | Arthur D. Little\                | SDB\    |
| **8(a), WO\            | Computer Sciences Corporation    | Large\  |
| DTTS59-99-D-00458**    | (CSC)\                           | Large\  |
|                        | Keane Federal Systems, Inc.\     | Large\  |
| ** **                  | Sterling Software\               | Large\  |
|                        | Strategic Business Solutions,    | SDB,WO\ |
| ** **                  | Inc.\                            | Sm      |
|                        | Structured Solutions, Inc.\      | all,WO\ |
|                        | VISTA Computer Services, Inc.\   | SDB\    |
|                        | WORDPRO, Inc.\                   | Small\  |
|                        | World Wide Technology, Inc.      | SDB     |
+------------------------+----------------------------------+---------+
| **Booz-Allen &         | Trawick and Associates\          | Sm      |
| Hamilton, Inc.**       | National Systems & Research      | all,WO\ |
|                        | (NSR)\                           | Small\  |
| **Large\               | Applied Quality Communications   | SDB,WO  |
| DTTS59-99-D-00468**    | (AQC)                            |         |
+------------------------+----------------------------------+---------+
| **Computer Resource    | APEX Technology, Inc.\           | SDB\    |
| Management, Inc.**     | Applied Research Associates,     | Small\  |
|                        | Inc.\                            | Small\  |
| **Small\               | Architecture Technology          | SDB\    |
| DTTS59-99-D-00459**    | Corporation\                     | \       |
|                        | Applied Techno-Management        | SDB,WO\ |
| ** **                  | Systems, Inc.\                   | SDB\    |
|                        | Computer System Technology,      | SDB,WO\ |
| ** **                  | Inc.\                            | SDB\    |
|                        | Datacom Services, Inc.\          | SDB\    |
| ** **                  | DUCOM, Inc.\                     | SDB\    |
|                        | Eastern Computers, Inc.\         | Large\  |
|                        | Force 3, Inc.\                   | SDB\    |
|                        | Integrated Information           | SDB     |
|                        | Technology Corp.\                |         |
|                        | PRT Group, Inc.\                 |         |
|                        | SABRE Systems, Inc.\             |         |
|                        | Telecom Solutions, Inc.          |         |
+------------------------+----------------------------------+---------+
| **Electronic Data      | Authorizations Systems           | Small\  |
| Systems Corporation    | Corporation\                     | Small\  |
| (EDS)**                | Atlantic Science & Technology\   | Large\  |
|                        | GTE Government Systems Corp.\    | SDB\    |
| **Large\               | Paradigm Solutions, Inc.\        | SDB\    |
| DTTS59-99-D-00464**    | Strategic Resources, Inc.\       | Small\  |
|                        | TVR Communications, Inc\         | SDB,WO  |
|                        | Windwalker Corporation           |         |
+------------------------+----------------------------------+---------+
| **EER Systems, Inc.\   | Communication Services           | Sm      |
| \                      | International, Inc. (CSI)\       | all,WO\ |
| Large, WO\             | Future Technologies, Inc. (FTI)\ | \       |
| DTTS59-99-D-00461\     | GE Capital IT Solutions (GE)\    | SDB\    |
| \                      | MCI Telecommunications Corp.\    | Large\  |
| \                      | Pilot Research Associates, Inc.\ | Large\  |
| \                      | Productivity Point               | Small\  |
| \                      | International, Inc. (PPI)\       | Large\  |
| **                     | Progressive Technology Federal   | Small\  |
|                        | Systems Inc\                     | \       |
|                        | Subsystem Technologies, Inc.     | SDB\    |
|                        | (SUBSYSTEMs)\                    | \       |
|                        | TelData Communications, Inc.\    | Small\  |
|                        | TRW                              | Large   |
+------------------------+----------------------------------+---------+

** **

ITOP CONTRACTORS/SUBCONTRACTORS - SOM (page 2 of 3)

  ------------------------ ----------------------------------- ----------- --
  **PRIME CONTRACTORS**    **SUBCONTRACTORS**                  **TYPE**    

  **FC Business Systems\   Advanced Engineering & Research     Small\      
  \                        Associates, Inc. (AERA)\            \           
  Small\                   Amdahl\                             Large\      
  DTTS59-99-D-00460**      AVANCO International, Inc.\         Small\      
                           Datametrics Systems corp.\          Small\      
                           Dynamic Computer Concepts (DCC)\    SDB\        
                           DMR Consulting Group, Inc.\         Large\      
                           ECG, Inc.\                          SDB\        
                           Hi-Tec Systems\                     SDB\        
                           International Action, Inc.          Small\      
                           (INTACT)\                           Small\      
                           Info Systems Headquarters Corp      Large\      
                           (ISHQ)\                             Small\      
                           ManTech International Corp.\        Small,WO\   
                           NEWLINK Global Engineering Corp.\   Small\      
                           Power Train, Inc.\                  SDB\        
                           SHERIKON, Inc.\                     SDB,WO\     
                           Support Systems Alternatives (SSA)\ SDB\        
                           Training Resources Group, Inc.      Small\      
                           (TRG)\                              SDB         
                           UNITEC Digital Systems, Inc.\                   
                           Vector Research, Inc.\                          
                           Vision Information Systems, Inc.                
                           (VISI)                                          

  **Lockheed Martin        AmerInd\                            SDB,WO\     
  Services, Inc.\          bd Systems, Inc.\                   SDB,WO\     
  \                        Logistics, Engineering &            SDB,WO      
  Large\                   Environmental Support Services,                 
  DTTS59-99-D-00466**      Inc. (LESCO)                                    

  **QSS Group, Inc.\       HTR\                                Large\      
  \                        JMS North America, Inc.\            Large\      
  8(a)\                    Macfadden & Associates, Inc.\       SDB\        
  DTTS59-99-D-00457**      SCI Consulting, Inc.\               Large,WO\   
                           Tata Consultancy Services (TCS)     Large       

  **RS Information         Advanced Resource Technologies,     SDB\        
  Systems, Inc.\           Inc. (ARTI)\                        \           
  \                        Arrowhead Space and                 SDB,WO\     
  8(a)\                    Telecommunications Inc\             \           
  DTTS59-99-D-00456**      Camber Corporation\                 SDB\        
                           COLSA Corporation\                  SDB\        
                           Computer Based Systems, Inc.        SDB\        
                           (CBSI)\                             SDB\        
                           International Computer &            \           
                           Telecommunications, Inc.\           SDB\        
                           ISSI Incorporated\                  SDB\        
                           Kajax Engineering, Inc. (KEI)\      SDB\        
                           KENROB and Associates, Inc.\        SDB,WO\     
                           SMF Systems Corporation\            SDB\        
                           System Integration and Research,    \           
                           Inc. (SIR)\                         SDB\        
                           Systems Resources Corporation       SDB\        
                           (SRC)\                              SDB\        
                           Supra Data Systems, Inc.\           SDB         
                           Technautics, Inc.\                              
                           ViaNet Corporation                              
  ------------------------ ----------------------------------- ----------- --

** **

ITOP CONTRACTORS/SUBCONTRACTORS - SOM (page 3 of 3)

+------------------------+----------------------------------+---------+
| **PRIME CONTRACTORS**  | **SUBCONTRACTORS**               | *       |
|                        |                                  | *TYPE** |
+------------------------+----------------------------------+---------+
| **Science Applications | American Systems Corp.\          | Large\  |
| International          | Crown Communications, Inc.\      | SDB\    |
| Corporation (SAIC)\    | Diverse Technologies Corp.\      | SDB\    |
| \                      | Future Enterprises, Inc.\        | SDB,    |
| Large\                 | Global Management Systems, Inc.\ | WO\     |
| DTTS59-99-D-00462**    | Government Micro Resources,      | SDB\    |
|                        | Inc.\                            | SDB\    |
|                        | HI-TECH International, Inc.\     | SDB\    |
|                        | Lucent Technologies, Inc.\       | Large\  |
|                        | Management Technologies, Inc.\   | Small,  |
|                        | Metrica, Inc.\                   | WO\     |
|                        | NETCOM Solutions\                | SDB,    |
|                        | Pinkerton\                       | WO\     |
|                        | SenCom Corp.\                    | SDB\    |
|                        | Stanford Telecomm, Inc.\         | Large\  |
|                        | Universal Systems & Technology   | Small\  |
|                        |                                  | Small\  |
|                        |                                  | SDB     |
+------------------------+----------------------------------+---------+
| **SRA International,   | AAC Associates, Inc.\            | Small\  |
| Inc.\                  | ANSTEC\                          | SDB\    |
| \                      | Bell Atlantic\                   | Large\  |
| Large\                 | COMTek\                          | SDB\    |
| DTTS59-99-D-00463**    | elf\                             | Sm      |
|                        | Ellsworth Associates\            | all,WO\ |
|                        | Interactive Systems, Inc.\       | Sm      |
|                        | Planning Technologies, Inc.      | all,WO\ |
|                        |                                  | Small\  |
|                        |                                  | SDB     |
+------------------------+----------------------------------+---------+
| **Stanley Associates,  | Analysis & Technology, Inc.\     | Large\  |
| Inc.**                 | Applied Management Systems\      | Small\  |
|                        | Catapult Technology\             | Small\  |
| **Large**              | CIBER Corporation\               | Large\  |
|                        | Digicon Corporation\             | Large\  |
| **DTTS59-99-D-00465**  | GRC International\               | Large\  |
|                        | Harris Technical Services        | Large\  |
|                        | Corporation\                     | Small\  |
|                        | J. G. Van Dyke & Associates\     | SDB\    |
|                        | Universal Hi-Tech and            | SDB     |
|                        | Development\                     |         |
|                        | Visitronix                       |         |
+------------------------+----------------------------------+---------+
| **Unisys Corporation** | Advanced Information Network     | SDB\    |
|                        | Systems Inc.\                    | \       |
| **Large\               | AT&T\                            | Large\  |
| DTTS59-99-D-00467**    | Avalon Integrated Services\      | SDB\    |
|                        | DSD Laboratories, Inc.\          | Small\  |
|                        | HTE-UCS, Inc.\                   | Large\  |
|                        | Management Systems Designers,    | Small\  |
|                        | Inc.\                            | Large\  |
|                        | Marconi/QSI (Tracor)\            | Small\  |
|                        | United Information Systems,      | S       |
|                        | Inc.\                            | mall,WO |
|                        | Wheat International              |         |
|                        | Communications                   |         |
+------------------------+----------------------------------+---------+

** **

** **

** **

ITOP CONTRACTORS/SUBCONTRACTORS - ISS (page 1 of 2)

  ------------------------ --------------------------------- ------------
  **PRIME CONTRACTORS**    **SUBCONTRACTORS**                **TYPE**

  **Allied Technology      A&T Systems, Inc.\                SDB\
  Group, Inc.\             Automated Business Systems &      SDB\
  \                        Services Inc\                     \
  8(a)\                    COMSYS Information Technology     Large\
  DTTS59-99-D-00450**      Services\                         \
                           Computer Associates               Large\
                           International, Inc. (CAI)\        \
                           Executive Security & Engineering  SDB,WO\
                           Technology\                       \
                           Federal Data Corporation (FDC)\   Large\
                           Hewlett-Packard Company (hp)\     Large\
                           IBM\                              Large\
                           M. C. Dean, Inc.\                 Large\
                           Sun Microsystems Federal, Inc.    Large\
                           (Sun)\                            SDB
                           Vistronix, Inc.                   

  **Booz-Allen & Hamilton, Comdisco, Inc.\                   Large\
  Inc.\                    CygnaCom Solutions, Inc.\         SDB\
  \                        Space Applications, Inc.\         Large\
  Large\                   Trawick & Associates, Inc.\       Small, WO\
  DTTS59-99-D-00454**      WALCOFF                           Small, WO

  **Integrated Management  Battelle\                         Large\
  Systems, Inc.\           Comdisco, Inc.\                   Large\
  \                        GRC International (GCRI)\         Large\
  8(a), WO\                Horizon Data Corporation, Inc.    SDB
  DTTS59-99-D-00449**      (HDC)                             

  **J. G. Van Dyke &       Catapult Technology\              Small\
  Associates, Inc.\        Galaxy Scientific Corporation\    Large\
  \                        IBM Business Recovery Services    Large\
  Small\                   (IBM BRS)\                        \
  DTTS59-99-D-00469**      ManTech Telecommunications &      Large\
                           Information Systems Corp.         \
                           (ManTech)\                        SDB\
                           RICOMM Systems, Inc.\             Large\
                           Systems Research & Applications   \
                           Corp. (SRA)\                      Large
                           Stanley Associates, Inc.          

  **Litton/TASC\           Advanced Management Technology,   SDB, WO\
  \                        Inc. (AMTI)\                      \
  Large\                   Comdisco, Inc.\                   Large\
  DTTS59-99-D-00455**      Horizons Technology, Inc. (HTI)\  Large\
                           Management Systems Applications,  SDB, WO\
                           Inc. MSA)\                        \
                           Litton/PRC\                       Large\
                           Raytheon\                         Large\
                           RS Information Systems, Inc.      SDB\
                           (RSIS)\                           SDB\
                           System Technology Associates,     \
                           Inc. (STA)\                       Large\
                           Sterling Software, Inc.\          Large
                           Validity Corporation              
  ------------------------ --------------------------------- ------------

** **

** **

** **

ITOP CONTRACTORS/SUBCONTRACTORS - ISS (page 2 of 2)

  ------------------------ ---------------------------------- ------------
  **PRIME CONTRACTORS**    **SUBCONTRACTORS**                 **TYPE**

  **Lockheed Martin        AmerInd\                           SDB, WO\
  Services, Inc.\          Comdisco, Inc.\                    Large\
  \                        SYTEX\                             Large\
  Large\                   Trident Data Systems\              Large\
  DTTS59-99-D-00453**      XETA International                 Small, WO

  **Logicon, Inc.\         Aries Systems International, Inc.\ Small\
  \                        Comdisco, Inc.\                    Large\
  Large\                   Communication Technologies, Inc.   SDB\
  DTTS59-99-D-00452**      (COMTek)\                          \
                           Hadron, Inc.\                      Small\
                           MindBank Consulting Group of       Small, WO\
                           Virginia, Inc.\                    \
                           Trusted Computer Solutions (TCS)   Small

  **TWM Associates, Inc.\  IBM\                               Large\
  \                        James Madison University, (JMU)\   N/A\
  8(a)\                    SphereCom Enterprises, Inc.\       Small, WO\
  DTTS59-99-D-00451**      TYBRIN Corporation                 Large
  ------------------------ ---------------------------------- ------------