P&P Optica Inc.

PALOMAR TECHNOLOGIES

Panavision SVI, LLC

Parker Hannifin Corporation

Passat Ltd.

PAVE technology co.

PCO AG

PCO AG

Pentadyne Power Corporation

Pepperl+Fuchs

PerkinElmer, Inc.

PermanentMark

Phoenix Photonics

Photo Research, Inc.

Photon Design

Photon Gear, inc.

Photon Kinetics, Inc.

PHOTON LINES

Photon Systems, Inc.

Photonfocus

Photonic Products Ltd

Photonic Solutions plc

Photonics Industries International, Inc.  Buyer's guide

Photonics Technology Obninsk

PHOTONICSTECH

Photron USA, Inc.

Phresh Photonics

Physical Optics Corporation

Physique industrie

PI (Physik Instrumente) L.P.

Picarro

PicoQuant GmbH

Pilz

Pinpoint Laser Systems

Plas-Labs, Inc  Buyer's guide

Plastic Capacitors, Inc

PLX Inc.

point source

Poly Software International

Polycold

Polycom

Polymicro Technologies, LLC

PolyScience DIVISION OF PRESTON INDUSTRIES,INC

polytec

Porvair Sciences Ltd.

Power Supply Systems

Powerlase

PR electronics

PRC LASER

Precision Applied Science, L.C.

Precision Photonics

Precision-Dynamics Inc.

Precitec, Inc.

PRIMES GmbH

Princetel, Inc

Princeton Instruments

Prior Scientific Instruments Ltd

Priorclave

Pro-Lite Technology LLP

ProMinent

Proteus Industries Inc.

PROXITRONIC

PTG Industries

PTR Optics

PYRO-CONTROLE  Buyer's guide

Pyrometer Instrument Company