| Crystek Crystals Corporation | Florida |
| Crytivo, Inc. | |
| Crywolf | California |
| CS 162: Operating Systems and System Programming | |
| CS 170 | California |
| CS 189/289A Introduction to Machine Learning | |
| CS Automation | New York |
| CS Creative | |
| CS DISCO, Inc. | |
| CS DISCO, Inc. | Texas |
| CS Electronics | California |
| CS KERN, Inc. | Indiana |
| CS Technologies Plus | Pennsylvania |
| CS&S Computer Systems, Inc. | Arizona |
| CS-Cart | California |
| CS2 Corporation | Florida |
| CS3 Advantage | Indiana |
| CSA Data Solutions | Connecticut |
| CSA Software | Michigan |
| CSAB, Inc. | Maryland |
| CSAW | Tennessee |
| CSBio | California |
| CSC TCI | California |
| CSDP | California |
| CSE | Florida |
| CSE Software, Inc. | Illinois |
| CSEO | Ohio |
| CSG International | Colorado |
| CSG Systems International, Inc. | Colorado |
| CSHEL Search Strategies | Illinois |
| CSI Electronics | Indiana |
| CSI Flex | |
| CSI International | Ohio |
| CSI Keyboards, Inc. | Massachusetts |
| CSi Networks | Florida |
| CSI Technologies, Inc. | California |
| CSI Works | California |
| CSL Software Solutions, Inc. | Vermont |
| CSL Solutions, LLC | |
| CSM South | Texas |
| CSN1 Technologies | Ohio |
| CSO | Massachusetts |
| CSO Agent | |
| CSoft.net | Pennsylvania |
| cSoftware Corporation | Arizona |
| CSP Electronics, LLC | Louisiana |
| CSP, Inc. | Massachusetts |
| Csper, LLC | |
| Csquare | |
| CSRHub, LLC | |