| SySTIUM Technologies, LLC | Minnesota |
| SysTools, Inc. | Utah |
| Systor Systems, Inc. | California |
| Systrends | Arizona |
| Sysut Computers | New York |
| Sysvine Technologies | |
| SYTE.bio, Inc. | Massachusetts |
| Sytec-USA, Inc. | Florida |
| Syteca | Massachusetts |
| SyTech, Inc. | Massachusetts |
| Sytek | Minnesota |
| Sytepoint, Inc. | |
| Syvantis Technologies, Inc. | |
| Syware, Inc. | Massachusetts |
| Syzmic | Louisiana |
| SyzOnc, Inc. | |
| Syzzle, Inc. | Virginia |
| Szymanski Consulting, Inc. | Pennsylvania |
| T and T Consulting Services, Inc. | |
| T Lex, Inc. | Massachusetts |
| T System, Inc. | Texas |
| T&R Solutions/T&R Recordings | |
| T-Cubed Systems, Inc. | California |
| T-Cure Bioscience, Inc. | California |
| T-knife Therapeutics, Inc. | |
| T-Metrics, Inc. | North Carolina |
| T-Mobile Puerto Rico, LLC | Washington |
| T-Mobile USA, Inc. | Washington |
| T-NeuroDX | |
| T-NeuroDx | |
| T-One | Michigan |
| T-Rex Computers | South Carolina |
| T-ROC | Florida |
| T-Scan Record Retrieval | Washington |
| T-Sign Studios | California |
| T-Tech Solutions, LLC | |
| T-Tech, Inc. | Georgia |
| T-Town Tech | |
| T-VEC | Florida |
| T. Brooks Web Design, LLC | New Jersey |
| T.N.D. Training & Marketing | |
| T.V.V. Productions | New York |
| T2 Biosystems | Massachusetts |
| T2 Consulting, Inc. | Minnesota |
| T2 Systems | |
| T2 technologies | Colorado |
| T2H Advertising | |
| T2S Solutions | |
| T3 | Florida |
| T3 Communications, Inc. | Florida |