| ID | Name | Type |
|---|---|---|
| #4028 | Druid | ? |
| #4029 | Druid Software | Z |
| #19488 | Druida 8 | - |
| #4030 | Drukkerij Salland BV | ? |
| #19815 | Drunk Fly | P |
| #4031 | Drzavna Zalozba Slovenije | ? |
| #4032 | DuMont | ? |
| #4033 | Dual Dimension Software | Z |
| #4034 | Duane A. Moore | ? |
| #17234 | Duchet Computers | S |
| #4035 | Ducksoft | Z |
| #17235 | Duckworth | B |
| #4036 | Duckworth Educational Computing | Z |
| #4037 | Ducky | ? |
| #17236 | Dudley Langmead Enterprises | A |
| #19434 | Duefectu Corp | P |
| #4038 | Duff | ? |
| #4039 | Duintronic | ? |
| #4040 | Duisburger Cracking Service | Z |
| #4041 | Duke | - |