- PGMS Inc.
- PGP Corporation
- PGS
- Phaedon Avouris
- Phantagram
- Phar Lap
- Phase Forward
- Phaser 3040
- Phaser 3250
- Phaser 3300MFP
- Phaser 3320
- Phaser 3600
- Phaser 3635MFP
- Phaser 4510
- Phaser 4600/4620
- Phaser 5550
- Phaser 6010
- Phaser 6280
- Phaser 6500
- Phaser 6600
- Phaser 6700
- Phaser 7100
- Phaser 7500
- Phaser 7800
- Phaser 8560MFP
- Phaser 8860MFP
- Phenom Software, LLC
- Phi Business Solution
- Phidiax, LLC
- Phil Farrand
- Philco
- Philco Telejogo
- Philco Telejogo II
- Philco Transac S-2000
- Philibert Maurice d'Ocagne
- Philip (Phil) R. Zimmermann, Jr.
- Philip Don Estridge
- Philip S. Yu
- Philip Stuart Milner-Barry
- Philipp Matthäus Hahn
- Philipp Winterberg
- Philippe Kahn
- Philips
- Philips Odyssey 200
- Philips Odyssey 2001
- Philips Odyssey 2100
- Philips P/330
- Philips P2000 T/M
- Philips P2000C
- Philips P3000
- Philips P5000 series
- Philips Tele-Game ES 2201
- Philips Tele-Game ES 2203 Las Vegas
- Philips Tele-Game ES 2204 Las Vegas
- Philips Tele-Game ES 2207 Travemünde
- Philips Tele-Game ES 2208 Las Vegas
- Philips Tele-Game ES 2218 Las Vegas
- Philips VG 5000
- Philips VG 8000
- Philips VG 8020
- Philips VG 8235
- Philips Videojeu N20
- Philips Videojeu N30
- Philips Videopac+ G7400
- Phill Gross
- Phillip A. Griffiths
- Phillip Walter Katz
- Phoenix Business Consulting
- Phoenix Data Corporation
- Phoenix Systems
- Phoenix Technologies Ltd
- Phone Co-op
- Phone-Mate Zonk
- Phone-Mate, Inc.
- Phone2Action, Inc.
- PhoneGnome
- Phonola
- Phonola Teleflipper
- Photo A.K.A.
- Photo Pos Pro
- Photo Story 3 for Windows
- Photobie
- Photobie
- Photodex
- Photoelectric Paper Tape Reader
- PhotoScape
- PhotoStage Slideshow Producer
- PHPEdit
- Phyxion
- Pianosoft
- Picasa
- Picis
- PICMG
- PicNet Pty Ltd
- PicoTech Solutions
- PICS ITech
- Picsel UK Ltd.
- PICTY700
- PICTY760