| ID | Name | Type |
|---|---|---|
| #18111 | Phillip Lake | + |
| #22854 | Phillip McCabe | + |
| #11485 | Phillip Ramsay | + |
| #11486 | Phillip Sproston | + |
| #11487 | Phipps Associates | P |
| #23116 | Phoebus Dokos | + |
| #11488 | Phoenix | ? |
| #11489 | Phoenix Publishing Associates | Z |
| #17618 | Phoenix Software Centre | S |
| #11490 | Phoenix Software Ltd | P |
| #19123 | Phoenix Software Systems | Z |
| #19791 | Phoenix Ware | P |
| #11491 | Phonex Software | Z |
| #15930 | Phyllis Stein | + |
| #11492 | Pi Software | Z |
| #11493 | Picador | ? |
| #11494 | Piccolo Books | Z |
| #11495 | Pick & Choose | Z |
| #11496 | Pick & Choose [F.G.] Ltd | Z |
| #11497 | Picosoft | Z |