DLL Manufacturers
- OmniVision Technologies Inc.
- On2.com
- Online Media Technologies Ltd.
- onOne Software
- ONTRACK Data International, Inc
- Ontrack Data Recovery Inc.
- OPC Foundation
- Open Design Alliance
- Open Market, Inc.
- Open Source Computer Vision Library
- Open Source Software community LGPL
- OpenLibSys
- OpenOffice.org
- OpenSC Project
- openwatcom.org
- Opera Software
- OPSWAT Inc.
- Optimay GmbH
- Oracle
- Origin Systems, Inc.
- Osborne
- Ositis Software, Inc.
- OSS Nokalva, Inc.
- PACE Anti-Piracy
- Pacific Gold Coast Corp.
- Package and Deployment AddIn
- Padus
- Palisade Corporation
- Palladium Interactive
- Palm, Inc.
- Palm Computing, Inc.
- PalmSource, Inc.
- Panasonic Communications Co., Ltd.
- Panda Software
- Pando Networks
- Pantone, Inc.
- Paragon Software Group
- Parallax69 Software Intl.
- Paul Messick
- PC-Doctor, Inc.
- PC Pitstop
- PC SOFT
- PC Tools
- PC Tools Research Pty Ltd.
- PCLE
- PCRx LLC
- PCTEL Inc.
- PCTools Research Pty Ltd.
- PDF Bean Inc.
- PDF Complete Inc.
- PDFlib GmbH
- PDFTron Systems Inc.
- Pegasus Imaging Corp.
- Pegasus Software
- Pegasys
- PerfectXML.com
- Perle Systems Ltd.
- Persits Software, Inc.
- Pervasive Software Inc.
- Pete Bernert
- Peter Gutman
- phamthuynhan PRODUCTIONS
- Philippe Goutier
- Philips Semiconductors
- Phoenix Technologies, Ltd.
- Photodex Corporation
- PictureViz
- Pierre E. Gougelet
- Pigeon Lake Software
- Pinnacle
- Piotr Pawluczuk, RafaB Lindemann
- Pipeline Digital, Inc.
- PIPI Tech.
- Piriform Ltd
- PixAround.com
- PixArt Imaging Incorporation
- Pixbyte Development SL
- Pixel Translations Incorporated
- PJsoft
- Planetside Software
- PM
- Pocket Soft Inc.
- PoDoFo
- PoINT Software & Systems GmbH
- Polar
- Polderland Language & Speech Technology
- Portrait Displays Inc.
- PowerISO Computing Inc.
- PowerQuest Corporation
- PPP Module
- Premia Corporation
- Preview Systems, Inc.
- Priberam Informática, Lda.
- PriceGong
- PRIMAX International b.v.
- Primo Software Corp
- Printing Communications Assoc
- PRIVAT
- Progressive Networks, Inc.
- PROject MT, Ltd.