| ID | Name | Type |
|---|---|---|
| #20277 | Poyo | - |
| #11605 | Pozyski | ? |
| #11606 | PrImer Educational Software | Z |
| #11608 | Practical Software | Z |
| #11609 | Precision Games | Z |
| #11610 | Precision Group | Z |
| #11611 | Precision Software Engineering | Z |
| #11612 | Predator | ? |
| #11613 | Predator Software | Z |
| #11614 | Predatory Group | Z |
| #11615 | Predrag Beciric | + |
| #11616 | Predrag Milicevic | + |
| #11617 | Preisler Industries | Z |
| #11618 | Prelude Press | Z |
| #11619 | Premier Corp. | Z |
| #17629 | Premier Mail Order | S |
| #11620 | Premier Software | Z |
| #11621 | Premium Software | Z |
| #11622 | Prentice-Hall International | B |
| #11623 | Prentice-Hall [US] | Z |