| **TheTitan Corporation** |
|--------------------------|
| **and itssubsidiaries**  |
| **As ofMarch 24, 2003**  |
|                          | **Name** |  | **Subsidiaryof:** |  | **Domicile** |
| 1                        |    | ACS Technologies,Inc. |  | The TitanCorporation |  | Virginia |
| 2                        | Atlantic AerospaceElectronics Corporation |  | The TitanCorporation |  | Delaware |
| 3                        | AverComCorporation |  | The TitanCorporation |  | Delaware |
| 4                        | BTG Systems Engineering,Inc. |  | BTG, Inc. |  | Virginia |
| 5                        | BTG Technology Resources,Inc. |  | BTG, Inc. |  | Florida |
| 6                        | BTG Technology Systems,Inc. |  | BTG, Inc. |  | Virginia |
| 7                        | BTG, Inc. |  | The TitanCorporation |  | Virginia |
| 8                        | C&N Enterprises,Inc. |  | The TitanCorporation |  | Virginia |
| 9                        | Calfornia TubeLaboratories, Inc. |  | Jaycor, Inc. |  | California |
| 10                       | Cayenta CanadaInc. |  | Cayenta, Inc. |  | Canada |
| 11                       | Cayenta eUtility Solutions– eMunicipal Solutions, Inc. |  | Cayenta Canada,Inc. |  | Nevada |
| 12                       | Cayenta Operating,LLC |  | Cayenta, Inc. |  | Delaware |
| 13                       | Cayenta, Inc. |  | The TitanCorporation |  | Delaware |
| 14                       | Concept Automation, Inc.of America |  | BTG Technology Resources,Inc. |  | Virginia |
| 15                       | Datacentric AutomationCorporation |  | The TitanCorporation |  | Delaware |
| 16                       | Datron/Trans WorldCommunications International Ltd. | The TitanCorporation |  | US VI |
| 17                       | DBA Systems,Inc. |  | The TitanCorporation |  | Florida |
| 18                       | DBA Systems, Delaware,Inc. |  | DBA Systems,Inc. |  | Delaware |
| 19                       | Delfin Systems |  | The TitanCorporation |  | California |
| 20                       | Delta ConstructionManagement, Inc. |  | BTG, Inc. |  | Virginia |
| 21                       | GlobalNet, Inc. |  | The TitanCorporation |  | Nevada |
| 22                       | GlobalNet, International,Inc. |  | GlobalNet, Inc. |  | Delaware |
| 23                       | Horizons TechnologyInternational. Ltd. |  | The TitanCorporation |  | Barbados |
| 24                       | Horizons ServicesCompany |  | The TitanCorporation |  | Delaware |
| 25                       | IntermetricsInternational, Inc. |  | The TitanCorporation |  | Massachusetts |
| 26                       | Intermetrics Securities,Inc. |  | The TitanCorporation |  | Massachusetts |
| 27                       | International Systems,LLC |  | C&N Enterprises, Inc.Midnight Oil Services, Inc. & R.W. Consultants, Inc. |  | California |
| 28                       | Jaycor, Inc. |  | The TitanCorporation |  | California |
| 29                       | LinComCorporation |  | The TitanCorporation |  | California |
| 30                       | LinCom Wireless,Inc. |  | LinComCorporation |  | Delaware |
| 31                       | LinkabitCorporation |  | The TitanCorporation |  | California |
| 32                       | Linkabit WirelessLimited |  | Linkabit Wireless,Inc. |  | Cayman Islands |
| 33                       | Linkabit Wireless,LLC |  | The TitanCorporation |  | Delaware |
| 34                       | MicrolithicsCorporation |  | VisiCom Laboratories,Inc. |  | Colorado |
| 35                       | Midnight Oil Services,Inc. |  | The TitanCorporation |  | California |
| 36                       | MJR Associates,Inc. |  | The TitanCorporation |  | Delaware |
| 37                       | Nations, Inc. |  | BTG, Inc. |  | New Jersey |
| 38                       | Procom Services,Inc. |  | Jaycor, Inc. |  | California |
| 39                       | Program SupportAssociates, Inc. |  | The TitanCorporation |  | Virginia |
| 40                       | Pulse Engineering,Inc. |  | The TitanCorporation |  | Maryland |
| 41                       | Pulse Sciences,Inc. |  | The TitanCorporation |  | California |
| 42                       | Research Planning,Inc. |  | BTG, Inc. |  | Virginia |
| 43                       | R.W. Consultants,Inc. |  | The TitanCorporation |  | California |
| 44                       | SenComCorporation |  | The TitanCorporation |  | Massachusetts |
| 45                       | SFG TechnologiesInternational, Ltd. |  | Cayenta CanadaInc. |  | Nevada |
| 46                       | STAC, Inc. |  | BTG, Inc. |  | Virginia |
| 47                       | Titan Africa,Inc. |  | Titan Wireless,Inc. |  | Delaware |
| 48                       | Titan Scan TechnologiesCorporation |  | The TitanCorporation |  | Delaware |
| 49                       | Titan Systems Solutions UKLtd. |  | VisiCom Laboratories,Inc. |  | United Kingdom |
| 50                       | Titan Vigil,Inc. |  | The TitanCorporation |  | Delaware |
| 51                       | Titan Wireless AfripaHoldings, Inc. |  | Titan Wireless,Inc. |  | Delaware |
| 52                       | Titan Wireless,Inc. |  | The TitanCorporation |  | Delaware |
| 53                       | Tomotherapeutics,Inc. |  | The TitanCorporation |  | Delaware |
| 54                       | Unidyne, LLC |  | The TitanCorporation |  | Delaware |
| 55                       | UniVision Technologies,Inc. |  | VisiCom Laboratories,Inc. |  | Illinois |
| 56                       | VisiCom Laboratories,Inc. |  | The TitanCorporation |  | Delaware |