P&O Cruises (UK)
P&O European Ferries (UK)
P&O Stena Line (UK)
PA Newsfile (UK)
Packaged Facts Publishing (US)
Packard Bell (US/Global)
PacketVideo (US)
PAGB - Proprietary Association of Great Britain (UK)
Pakistan International Airlines (Pakistan)
Pampers (US/Global)
Pan American World Airways (US)
Panasonic (UK)
Panasonic (US)
Panasonic/Matsushita (Japan)
Panel Study of Income Dynamics (US)
Panorama (Belgium)
Panorama (Spain)
Panorama Holiday Group (UK)
Pantene (France/Global)
Pantone (US)
Paragon Car Finance (UK)
Paragon Publishing (UK)
Paramount (US)
Paramount Zone (UK)
Parcelforce (UK)
Parent Soup (US)
ParenthoodWeb (US)
ParentsPlace (US)
Parker's (UK)
Parrot Communications (Media Directories) (US)
Patek Philippe (Switzerland)
Paul Smith (UK)
Pauly's Playhouse (US)
Paxelle Just-n-Case (UK)
Pay Per Click Analyst (US)
PBL - Publishing & Broadcasting Ltd (Australia)
PBS (US)
PBS Kids! (US)
PC Direct (UK)
PC Quote (US)
PC Webopaedia (US)
PC World (UK)
PC World (US)
PC World Marketing (US)
PCCW (Hong Kong/Global)
Pdf995 (US)
PDMA - Product Development & Management Association (US)
Peapod (US)
Pearl & Dean (UK)
Pearson Television (UK)
Pedigree (US/Global)
Pedigree Petfoods - PetCat (UK)
PegasoWeb (US)
Penguin (UK)
Peninsula Group (Hong Kong )
Pennzoil (US)
Pentax (US)
Penthouse (US)
People (US)
Peoplebank (UK)
PeopleSoft (US/Global)
Peoplesound (UK)
Pepsi (US/Global)
Pepsi Chart (UK)
PepsiCo (US/Global)
Performance Research (UK)
Perrier (France/Global)
Perry Ellis Menswear (US)
Persil (UK)
Personality Test (US)
Pet Times (US)
Petco (US)
Petmad (Ireland)
PetNet (Australia)
Petopia (US)
Petry Media Corporation (US)
Pets at Home (UK)
Pets Direct (UK)
Pets Pyjamas (UK)
Pets.com (US)
PetSmart (UK)
PetSmart (US)
Petsonthebrain (UK)
Petspark (UK)
Petstore (US)
Peugeot (France/Global)
Pfizer - Medscape Healthcare (US)
Pfizer Inc. (US)
Pharma-ID (UK)
Pharmacia & Upjohn (US)
Pharmacy2U (UK)
PharmiWeb (UK)
PharmWeb (UK)
PHD (UK)
Philip Morris (US/Global)
Philippine Airlines (Philippines)
Philips (Netherlands/Global)
Phonefactory (UK)
Photobox (UK)
PhotoDisc (US)
PhotoEssentials (Australia)
Photos To Go (US)
PhRMA - Pharmaceutical Research and Manufacturers of America (US)
Picsearch (US)
Pictor (UK)
PictureAnywhere (US)
PictureQuest (US)
Pier 1 (US)
Pierhouse (UK)
Pierre Fabre (France)
Piggly Wiggly (US)
Pilat (UK)
Pilat (US)
Pillsbury (US)
Ping (US)
Pinnacle Trade Show Displays (US)
Pinpoint Golf Marketing (US)
Pioneer Electronics (US)
Pirelli (Italy/Global)
Pixelpark (Germany)
Pizza Express (UK)
Pizza Hut (US)
PJ's (UK)
PlacesToStay (US)
Planet Holiday (Thailand)
Planet Medica (Belgium)
Planet One Parent (US)
Planet Rugby (UK)
Planet Twinkie (US)
Planetary News (US)
PlanetFeedback (US)
Planetfootball (UK)
PlanetRx (US)
Planetweb (US)
Planit4kids (UK)
PlanitMedia (Sweden)
Planning above and beyond (UK)
planregionalpress (UK)
Plaxo (US/Global)
Playboy (US)
Playboy TV (UK)
PlayJam (UK)
Plumbworld (UK)
Plus (Spain)
Plymouth Gin (UK)
PMRS - Professional Marketing Research Society (Canada)
Pocket-lint (UK)
Point of Purchase Magazine (US)
PointLogic (Netherlands)
Polaroid (US)
PolicySure (UK)
Polish Yellow Pages (Poland)
PoliticsDirect (UK)
Polycell (UK)
Polycom (US)
Polydor (UK)
PolyGram (US)
Pontiac (US)
POPAI - Point Of Purchase Advertising International (US)
POPcast (US)
PopCultures (US)
PopMatters (US)
Popular Mechanics (US)
Population (US/Global)
Population Reference Bureau (US/Global)
Population Research (UK)
Porsche (Germany/Global)
Portfolios.com (US)
Portland (UK/Global)
Portland Holidays (UK)
Portolano Project (US)
PositionAgent (US)
Postar (UK)
Postcode Plants Database (UK)
PostCom - Association for Postal Commerce (US)
Poster Publicity (UK/Global)
Posters On Wheels (UK)
Posterscope (UK)
PostMasterDirect (US)
Pottery Barn (US)
Power Surge (US)
PowerGen (UK)
Powermarque (UK)
PowerTV (US)
PPA - Periodical Publishers Association (UK)
PPA Marketing (UK)
PPAinteractive (UK)
PPP - Long Term Care (UK)
PPP Healthcare (UK)
PR Newswire (US)
Pravda (Slovak Republic)
PRCA - Public Relations Consultants Association (UK)
PRE-fix (UK)
Preference Services (US)
Preloved (UK)
Premier International Foods (UK)
Premier Magazines (UK)
Premiere (Germany)
Premiere (US)
Premiere World (Germany)
Presents Direct (UK)
Press Association (UK)
Press Release Network (US)
Pret A Manger (UK)
Prevention (US)
Preview (UK)
Preview Travel, Inc. (US)
Price Jamieson (UK)
Price Watch (US)
Priceline (US)
PriceWaterhouseCoopers (UK)
PrimairSites (UK)
Primelocation (UK)
Primesight (UK)
Princeton Video Image (US)
Principles (UK)
Pringles (US)
Pripps (Sweden)
Private Eye (UK)
Pro Sport Marketing (US)
ProBoost (US)
ProcessRegister (US)
Procter & Gamble (US)
Prodigy (US)
Productopia (US)
Productscan (US)
Produxion (UK)
Profound (UK)
ProFusion (US)
Progressive Grocer (US)
Promo Magazine (US)
PromoBikes (UK)
Promotion Image (US)
Promotional Keychains (US)
PromotionLINK (US)
Promotions Media (US)
Promotions.com (US)
Promotions.org (UK)
Promus Hotel Corporation (US)
Pronet (Canada)
Properties Nationwide (UK)
Property Finder (UK)
Property Wave (UK)
Property World (UK)
PropertyLive (UK)
ProQuest (UK)
ProShare Investment Clubs (UK)
ProSieben (Germany)
ProSieben Media AG (Germany)
Prospects (UK)
ProspectShop (UK)
Prowse & Hargood (UK)
Prudential (UK)
Prudential Financial (US)
PSA Peugeot Citroen (France/Global)
Pseudo (US)
Psion (US/Global)
Psygnosis (US)
PUB (Belgium)
Public Record Office (UK)
Publicis (France)
Publicis (UK)
Publicis Consultants (UK)
Publieurope (Italy)
Publishers on the Internet - Faxon (US)
PublishersWeekly (US)
PubZone (Canada)
Puma (UK)
Purina (US)
