| Computing Technology Solutions, LLC | Illinois |
| Computize, Inc. | Texas |
| Computol, Inc. | Ohio |
| Computoners | New York |
| Computools, LLC | New York |
| CompuTrain Business Solutions, Inc. | Texas |
| CompuTrak | Colorado |
| Computrition | California |
| Computrols, Inc. | Louisiana |
| Computron, Inc. | Illinois |
| Computronics | Illinois |
| Computronix, LLC | Texas |
| Computrs, Inc. | New Jersey |
| Compuvate Corporation | New York |
| Compuverse | Virginia |
| CompuVision Systems, Inc. | Texas |
| Compuweb | Pennsylvania |
| CompuWiz | Pennsylvania |
| Compvue, Inc. | California |
| CompX International, Inc. | Texas |
| CompXpress, Inc. | |
| CompyAssistant | New Jersey |
| ComQuip, Inc. | Florida |
| Comrade Web Agency | Illinois |
| Comrex Corporation | Massachusetts |
| COMSAT | |
| ComScire | New Mexico |
| comScore, Inc. | Virginia |
| Comsearch | Virginia |
| Comsearch, Inc. | Rhode Island |
| Comsense Technologies | Georgia |
| Comsense, Inc. | |
| Comserv USA | Texas |
| Comserve Systems, LLC | Pennsylvania |
| ComSite International, Inc. | Texas |
| COMSO, Inc. | |
| Comsol, Inc. | Massachusetts |
| ComSolutions, Inc. | Missouri |
| Comsource, Inc. | Michigan |
| ComSpec International, Inc. | Michigan |
| Comstar, Inc. | Minnesota |
| Comstar, LLC | Wisconsin |
| Comstock Telcom | Nevada |
| ComTec | Texas |
| ComTec Solutions | |
| ComTec Systems, Inc. | New Jersey |
| Comtech EF Data Corporation | Arizona |
| Comtech Global, Inc. | Ohio |
| Comtech Phones Corporation | Washington |
| Comtech PST | New York |