COMPUTER SCIENCES CORPORATION EXHIBIT 21, Significant Active Subsidiaries and Affiliates As of April 2, 1999 Jurisdiction of Name Organization - ---- --------------- Aerospace Center Support (Partnership) Tennessee Alliance-One Services, Inc. Delaware Autec Range Services (Partnership) Florida Automated Systems (HK) Limited Hong Kong Automated Systems Holdings Limited Bermuda Calva Realty Corporation Nevada Capsco Pty. Limited Australia Century Corporation Nevada Computer Sciences Canada Inc. Canada Computer Sciences Corporation Administration Services (Pty) Limited South Africa Computer Sciences Corporation Continuum--Informatica, Lda Portugal Computer Sciences Corporation Services (Pty) Limited South Africa Computer Sciences Gestion S.A. France Computer Sciences International A/S Norway Computer Sciences Raytheon (Partnership) Florida Computer Systems Advisers (M) Bhd Malaysia Continuum (Deutschland) GmbH Germany Continuum Direct Limited United Kingdom Continuum France SARL France Continuum SICS S.A. Belgium Credit Bureau of Tulsa, Inc. Oklahoma CSA Automated Private Limited Singapore CSA Holdings Ltd Singapore CSA Private Limited Singapore CSC Accounts Management, Inc. Texas CSC Accounts Resolution, Inc. Nevada CSC Asset Management Inc. Nevada CSC Australia Pty. Limited Australia CSC Computer Management A/S Denmark CSC Computer Sciences B.V. Netherlands CSC Computer Sciences Corporation Ireland Limited Ireland CSC Computer Sciences Iberica, S.A. Spain CSC Computer Sciences Italia S.p.A. Italy CSC Computer Sciences Limited United Kingdom CSC Computer Sciences N.V./S.A. Belgium CSC Computer Sciences Pte Limited Singapore CSC Computer Sciences S.A. France CSC Computer Sciences S.A. Luxembourg CSC Computer Sciences s.r.o. Czech Republic CSC Computer Sciences SARL Switzerland CSC Computer Sciences Sdn Bhd Malaysia CSC Computer Sciences Services Management GmbH Germany CSC Computer Sciences spol. s.r.o. Slovakia CSC Computer Sciences VOF/SNC (Partnership) Belgium CSC Consulting B.V. Netherlands CSC Consulting, Inc. Massachusetts Jurisdiction of Name Organization - ---- --------------- CSC Corporation Limited United Kingdom CSC Credit Services, Inc. Texas CSC Danmark A/S Denmark CSC Domestic Enterprises, Inc. Nevada CSC Enterprises (Partnership) Delaware CSC Enterprises, Inc. Nevada CSC Financial Services Canada Inc. Canada CSC Financial Services GmbH Germany CSC Financial Services Group (Hong Kong) Limited Hong Kong CSC Financial Services Group Pty. Limited Australia CSC Financial Services Limited United Kingdom CSC Financial Services S.A. France CSC Foreign Sales Corporation Barbados CSC Geographic Technologies Inc. Nevada CSC Healthcare Inc. California CSC Holdings Inc. Nevada CSC Infogerance S.A. France CSC Information Systems A/S Denmark CSC International Consulting AB Sweden CSC International Systems Management Inc. Nevada CSC Investment Services Management Limited United Kingdom CSC Japan, Ltd. Delaware CSC Kobra Beheer B.V. Netherlands CSC Logic, Inc. Texas CSC New Zealand Limited New Zealand CSC Outsourcing Inc. Nevada CSC Peat Marwick S.A. France CSC Pergamon GmbH Germany CSC Ploenzke (Austria) GmbH Austria CSC Ploenzke (Schweiz) AG Switzerland CSC Ploenzke AG Germany CSC Ploenzke Akademie GmbH Germany CSC Ploenzke IT--Services GmbH Germany CSC Ploenzke, S.A. Spain CSC PMF S.A. France CSC PM Services SARL France CSC Professional Services Group, Inc. Maryland CSC Services Management B.V. Netherlands CSC Services No. 1 Limited United Kingdom Experteam S.A./N.V. Belgium Informatica S.p.A. Italy Kalchas Limited United Kingdom Key Choice Insurance Marketing Limited United Kingdom Paxus Australia Pty. Limited Australia Paxus Broker Services Pty. Ltd. Australia Paxus Corporation Limited New Zealand Paxus Financial R&D Pty. Limited Australia PT. CSC Computer Services Indonesia Sys-Aid Beheer B.V. Netherlands Sys-Aid Deutschland GmbH Germany