| ID | Name | Type |
|---|---|---|
| #9533 | Mental Inspiration Unity | Z |
| #9534 | Mentor Software | Z |
| #20322 | Menyiques | + |
| #20321 | Menyiques Soft | P |
| #9535 | Meow Micros | P |
| #9536 | Mercurian Pulp Products | Z |
| #9537 | Mercury Software | Z |
| #9538 | Merimpex Ltd | Z |
| #20650 | Merisoft | P |
| #9539 | Merlin | ? |
| #17479 | Merlin Games | R |
| #9541 | Merlin Software [RU] | Z |
| #9540 | Merlin Software [UK] | Z |
| #5859 | Merv Jones | + |
| #16297 | Mervin J. Cagle | + |
| #9542 | Mervin James | + |
| #19957 | Mervyn Bagshaw | + |
| #9543 | Mervyn J. Estcourt | + |
| #9544 | Mesoft | Z |
| #21242 | Metacomco | Z |