| ID | Name | Type |
|---|---|---|
| #17332 | Hardware International | H |
| #5748 | Hardware Wizard | ? |
| #5749 | Hardy | ? |
| #5750 | Hardy Strassenburg | ? |
| #5751 | Haresoft Ltd | Z |
| #19639 | Hark0 | - |
| #5752 | Harlequin Software | P |
| #5753 | Harley Davidson | Z |
| #21466 | Harley Shanko | + |
| #5754 | Harley Systems Ltd | H |
| #22775 | Harm-Georg Kuhlmann | + |
| #5755 | Harold Bentley | + |
| #5756 | Harold Burton | + |
| #5757 | Harold Coyle | + |
| #5758 | Harold Gale | + |
| #5759 | Harold Gale Associates Ltd | Z |
| #5760 | Harper & Row Publishers Inc | Z |
| #5761 | Harrap | ? |
| #5762 | Harris & Lockyer Associates | Z |
| #5763 | Harris Computer Aids | Z |