| ID | Name | Type |
|---|---|---|
| #14508 | Theo's Micro-Engineering | Z |
| #16425 | Theodora Wood | + |
| #14509 | Theodore Blitsas | + |
| #14510 | Theodore Develegas | - |
| #16655 | Therac25 | ? |
| #17822 | Thersby Computers | H |
| #14511 | Thetford Crime Prevention Panel | Z |
| #14512 | Thetford Micros | R |
| #23127 | Thierry Vanbaelingem | + |
| #14513 | Thies Language Software | Z |
| #22445 | Thimoty | + |
| #14514 | Thin Chen Enterprise Co Ltd | Z |
| #14515 | Thing | ? |
| #14516 | Think Tank Educational Software | Z |
| #14517 | Thinking Rabbit | Z |
| #14518 | Thom Hogan | + |
| #14519 | Thomas | - |
| #21726 | Thomas A. Christie | P |
| #18334 | Thomas B. Woods | + |
| #14520 | Thomas Baker | + |