- OTAX
- Otio
- OvisLink
- OXANCE
- Oxygen
- Ozone
- Packard Bell
- PALISADE
- Palm
- Panasonic
- Pantech
- PARADOX
- Paragon Software
- Parallels
- Parkside
- ParkZone
- Parrot
- Partner
- PEAQ
- Peavey
- Pelgrim
- Pentair
- Pentax
- Pentax Série
- PERFORMANCE
- Peugeot
- Pfaff
- PGP
- Philco
- Philips
- Philips-Saeco
- PhotoFiltre
- PIAGGIO
- Pinnacle
- Pioneer
- Pitney Bowes
- Plantronics
- Playmobil
- Plextor