EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT NAME STATE OF INCORPORATION Accounting Principals, Inc. Pennsylvania AccuStaff Incorporated Florida AccuStaff/Computer Action, Inc. Florida AD, L.L.C.I Delaware Additional Technical Services, Inc. Massachusetts Advance Possis Technical Services, Inc. Minnesota Advantage Personnel Services, Inc. California Ames/Standby of Philadelphia, Inc. Pennsylvania AMPL, Inc. d/b/a Parker Lynch California BC, L.L.C.I Delaware Berrett Tech Alliance Corp. Virginia Bogard Temps, Inc. California CADSTAR International, Ltd. Massachusetts Career Horizons Government Services, Inc. Career Horizons, Inc. New York Century Temporary Services, Inc. Ohio CHI Payroll Services, Inc. Delaware CHI Financial Services, Inc. Delaware CHI Services, Inc. Delaware CHI Temporary Services, Inc. Delaware Computer Professionals, Inc. (CPI) Florida Contemporary Graphic Group, Inc. New York Contact Recruiters, Inc. New Hampshire Contract Staffing Group, Inc. South Carolina Custom Software, Inc. Michigan CSG Acquisition Corp. Connecticut Datacorp Business Systems, Inc. Ohio Debbie Temps, Inc. Illinois Dial A Temporary, Inc. Delaware DuPay Enterprises, Inc. d/b/a ASOSA Personnel Arizona EMI Associates, Inc. Arizona Excel Services of Atlanta, Inc. Georgia Excel Services of Cobb Co., Inc. Georgia Excel Services of DC, Inc. Georgia Excel Technical Services, Inc. Georgia Excel Temporary Services, Inc. Georgia Excel Training Services, Inc. Georgia Executive Monitors, Inc. Pennsylvania Experts, Inc. Massachusetts Firstaff, Inc. Minnesota Goldfarb-Wasson Associates, Inc. California GW Temporaries, Inc. California HR Management Services, Inc. Michigan Health Force Operating Corporation New York Health Force, Inc. New York HJM Consulting, Inc. New York JLS Software Services, Inc. Keystone Consulting Group, Inc. Georgia Lawstaf Legal Search, Inc. Georgia Lawstaf, Inc. Georgia Logue & Rice Temp, Inc. Virginia Logue & Rice Temp, Inc. Georgia Legal Support Personnel, Inc. New York The Lenco Group, Inc. Massachusetts Lenco Pro, Inc. Massachusetts LIT Merger Corp. Manchester, Inc. Pennsylvania Matthews Professional Services, Inc. Illinois McKinley Group, Inc. Virginia Medi-Force, Inc. New York Mid-States Tech. Staffing Services, Inc. Iowa National Software Associates, Inc. Massachusetts Nomaha, Inc. (a wholly-owned subsidiary of Placers) Pennsylvania North American Consulting Services, Inc. Florida Openware Technologies, Inc. (a wholly-owned subsidiary of CPI) Florida Outsource Staffing, Inc. Ovation Technologies, Inc. New Hampshire PeopleSystems, Inc. Florida PTA Int't, d/b/a Perma Temp Agency California Perspective Technology Corporation Virginia PFC - California (1995) Placers, Inc. Delaware PL Services, Inc. Delaware Potomac Personnel Services, Inc. Delaware Preferred Consulting Services, Inc. Minnesota Programming Enterprises, Inc. California Project Professionals, Inc. California Resource Solutions Group, Inc. Michigan Richard Michael Group, Inc. Delaware Scientific Staffing, Inc. Pennsylvania Scientific Staffing of Ft. Lauderdale, Inc. Florida Scientific Staffing of Tampa Bay, Inc. Florida Special Counsel, Inc. Maryland Special Counsel International, Inc. New York Staff-Additions, Inc. North Carolina Staffing Resources, Inc. Washington Staffware, Inc. Texas Systems Group, Inc. (3 volumes) System Pros, Inc. Massachusetts TEKNA Inc. (a wholly-owned subsidiary of CPI) Virginia Technical Software Solutions, Inc. Maryland TempForce, Inc. New York Tempo Health Power, Inc. (Original) New York Temps & Co. Franchising, Inc. Delaware Temps & Co. Services, Inc. Delaware TempsAmerica, Inc. Delaware Training Delivery Service, Inc. (TDSI) California TSG Acquisitions Corporation New Hampshire Wasser, Inc. Washington Why Systems, Inc. Delaware Zeitech, Inc. New York