Hersteller
- P&H Electronics
- PACO Precision Apparatus Corporation
- Palec Paton Electrical PTY LTD
- Palomar Engineers
- Panasonic
- Panoramic Radio Products
- Parasound
- Parks Electronic Laboratory
- Penlon
- Pentax
- Pfaff
- Philco
- Philips
- Philips Medical Systems
- Philmore Manufacturing
- Pierson Electronic Corporation
- Pilot Radio and Tube Corporation
- Pioneer
- Plessey Electronics
- Plus Vision Corp.
- Polaroid
- Polytronics
- Power Designs Inc.
- PowerTen
- Präcitronic
- Practical Electronica Sound Design
- Precise Development Corporation
- Precision Electronics
- Prema Präzisionselektronik und Messanlagen GmbH
- President
- Programmed Test Sources Inc.
- Protek
- Proview
- Proxxon
- Pulmonetic Systems
- Puritan Bennett
- Puxing
- PYE
