| ID | Name | Type |
|---|---|---|
| #17338 | Hayes Computer Centre | A |
| #5793 | Haytech France | ? |
| #5794 | Hazard | - |
| #5795 | Hazard Dreams | ? |
| #19976 | HeartWare | P |
| #5797 | Heath Computing | Z |
| #17339 | Heath Microware | S |
| #5798 | Heather Govier | + |
| #5799 | Heaven Aeroplane | ? |
| #18925 | Heavy Spectrum Limited | P |
| #20404 | Hebdogiciel Software | P |
| #23080 | Hecho Con Pixels | B |
| #5800 | Hedda Schatz | ? |
| #18965 | Hedge1970 | - |
| #5801 | Heep Soft | Z |
| #5802 | Heike Fillinger | + |
| #5803 | Heikki Julkunen | + |
| #20338 | Heiko Altmann | + |
| #5804 | Heiko Kieser | + |
| #5805 | Heinemann | ? |