P
- P3 International
- PAC
- Pacific Digital
- Packard Bell
- Palm
- Palsonic
- Panamax
- Panasonic
- Pandigital
- Panduit
- Pantech
- Pantone
- ParaBody
- Paradigm
- Paradise
- Paradyne
- Paragon
- Paralan
- Parallels
- Parasound
- Parent Units
- Parker Hannifin
- ParkerVision
- Parrot
- Paslode
- Pass Labs
- Patterson-Kelley
- Paxar
- Paxton Automotive
- PC Connection
- PDP
- PEAK-System Technik
- Pearson
- Peavey
- PeerCall
- Pelco
- Pelican
- Pella
- Pelonis
- Penpower
- Pentair
- Pentax
- Pentek
- Perception Digital
- Perle Systems
- Perlick
- Perreaux
- Pertech
- Peterbilt
- Petri
- Petsafe
- Peugeot
- Pfaff
- PGS
- Phase One
- Phase Technology
- PhatNoise
- Philco
- Philex
- Philips
- Philips Lighting
- Phoenix Gold
- Phonex Broadband
- Phonic
- Photogenic Professional Lighting
- Pico Macom
- PictureTel
- Piega
- Pinnacle Design
- Pioneer
- Pirelli
- Pitco Frialator
- Pitney Bowes
- Pixel Magic Systems
- PiXie
- Planar
- Planet Bike
- Planet Technology
- Planon System Solutions
- Plantronics
- Plasmon
- PLATEAU
- Plawa
- Playskool
- Playstation
- Plextor
- Plinius Audio
- Plus
- Plustek
- Plymouth
- PMC-Sierra
- PNY
- Polar
- Polaris
- Polaroid
- Polk Audio
- Polycom
- Pontiac
- Popular
- Porsche
- PORT
- Port-A-Cool
- Porter-Cable
- Portsmith
- Poulan
- Poulan Pro
- Power Drive
- Power Systems
- PowerBass
- Powercom
- PowerDsine
- Powerex
- PowerFile
- Powerline
- Powermaster
- Powermate
- Powermatic
- PowerMax
- PowerTec
- Powerware
- PQI
- Praktica
- Pramac
- Precision Power
- Precisionaire
- Precor
- Preh
- Premier
- Premier Mounts
- Pressure Systems
- Prestige Medical
- Prestigio
- Presto
- Pride Mobility
- Prima
- Primax Electronics
- Primera Technology
- Primo Water
- Prince Castle
- Princess
- Princeton
- Printek
- Printronix
- Pro-Ject
- ProClip
- Procom
- Professional Series
- Profile
- ProForm
- Profoto
- Progressive Turf Equipment
- Proline
- PROLiNK
- ProMaster
- Promise Technology
- ProMounts
- Protec
- Proton
- Proview
- Proxim
- Prozone Pool Products
- PS Audio
- PSA
- PSB Speakers
- PSC
- Psiber Data Systems
- Psion Teklogix
- Pulsar
- Pure Acoustics
- Pure Digital
- PYLE Audio
- Pyramat
- Pyramid Car Audio
- Python