| ID | Name | Type |
|---|---|---|
| #5409 | Global Software | P |
| #5410 | Globe Press | Z |
| #17316 | Globel Computer Consultants | R |
| #5411 | Gloster Software | Z |
| #5412 | Gloucester Press | Z |
| #21907 | Gluck | - |
| #5413 | Glyn Kendall | ? |
| #16161 | Glyn Watson | + |
| #17960 | Glyn Williams | + |
| #5414 | Glynn Carey | + |
| #5415 | Glyuker | ? |
| #21641 | Go Faster Stripe | P |
| #5416 | Go! | P |
| #5417 | Go-It-Alone Software | Z |
| #5418 | GoCom | Z |
| #20536 | Goblin | - |
| #5419 | Goblin Graphics | Z |
| #5420 | Godfrey Boyle | + |
| #18096 | Godfrey Dowson | + |
| #5421 | Godwin Graham | + |