| 1 | P&M Designs | United Kingdom | | |
| 2 | P&M Software | United Kingdom | | |
| 3 | P. Boulton Software |
| 4 | P. Duffin | United Kingdom | | |
| 5 | P. Stanley | | | |
| 6 | P.A. Soft | Russia | | |
| 7 | P.A.W. Software | United Kingdom | | |
| 8 | P.B. Soft | Italy | | |
| 9 | P.B. Software | United Kingdom | | |
| 10 | P.C.G. Computer Software | United Kingdom | | |
| 11 | P.D. Visual Marketing | United Kingdom | | |
| 12 | P.D.A. Systems | United Kingdom | | |
| 13 | P.J. Software | Spain | | |
| 14 | P.N. Software | Netherlands | | |
| 15 | P.R. Computer | Hungary | | |
| 16 | P.R. Software [2] | | Philip Richmond | | | | |
| 17 | P.W. Software | Germany | | |
| 18 | Pablo Ariza Software Ltd |
| 19 | PAC Soft | Spain | | |
| 20 | Pace Software | United Kingdom | | |
| 21 | Pacific Software | United Kingdom | | |
| 22 | Paddy Coleman | United Kingdom | | |
| 23 | Pagesoft |
| 24 | PAL Developments | | Palmer Acoustics Ltd | | | | |
| 25 | PAL Developments | | | |
| 26 | PAL Software | United Kingdom | | |
| 27 | Palace Software | | Palace Video Group | | | | |
| 28 | Palace Video Group | | | |
| 29 | Palamar Software | | Mariano E.M. Chiaverano | | | | |
| 30 | Palantir Programs | United Kingdom | | |
| 31 | Palle Norman | Denmark | | |
| 32 | Palmer Acoustics Ltd | | | |
| 33 | Palsoft | Russia | | |
| 34 | Pan Books Ltd | | Macmillan Publishers Ltd | | | | |
| 35 | Panc Software | Russia | | |
| 36 | Panda Design | | | |
| 37 | Panda Software | United Kingdom | | |
| 38 | Pandora | | Interceptor Group | | | | |
| 39 | Pandovisia Software | Serbia | | |
| 40 | Panic Software | Spain | | |
| 41 | Panik Software |
| 42 | Pansoft | Russia | Belgorod | |
| 43 | Pantheon Software | United Kingdom | | |
| 44 | Papaya Dezign | Portugal | | |
| 45 | Papermac | | Macmillan Publishers Ltd | | | | |
| 46 | Papersoft | Italy | | |
| 47 | Papillon Software | United Kingdom | | |
| 48 | Paradise | Russia | | |
| 49 | Paradise Software [1] | United Kingdom | | |
| 50 | Paradise Software [2] | United Kingdom | | |
| 51 | Paradox Crew | Russia | Krasnodar | |
| 52 | Paragon Group | Belarus | Mogilev | |
| 53 | Paragon Programming Ltd | | Tiertex Ltd | | | | |
| 54 | Paraninfo S.A. | Spain | | |
| 55 | Paraninfo Soft S.A. | | Paraninfo S.A. | | | | |
| 56 | Paranoid Software | United Kingdom | | |
| 57 | Parker Brothers | | Hasbro Inc | | | | |
| 58 | Parker Software | | Parker Brothers | | | | |
| 59 | Parkgate Publishers | United Kingdom | | |
| 60 | Parlophone | | | |
| 61 | Partyline Ltd | United Kingdom | | |
| 62 | Partyzans | Russia | Rostov-on-Don |  |
| 63 | PASA Soft | Spain | | |
| 64 | PASE Group | United Kingdom | | |
| 65 | Pasesoft | | PASE Group | | | | |
| 66 | Patrick Software | Croatia | | |
| 67 | Patrik Rak | Czech Republic | | |
| 68 | Patxi Projects | Spain | | |
| 69 | Paul Coyle Software | United Kingdom | | |
| 70 | Paul McKenna | | | |
| 71 | Paul Tomkins | United Kingdom | | |
| 72 | Pavel Korensky Computer Software | | | |
| 73 | Paxman Promotions | | Prism Leisure Corporation PLC | | | | |
| 74 | PB Systems | United Kingdom | | |
| 75 | PCG Software | United Kingdom | | |
| 76 | PDQ Software | United Kingdom | | |
| 77 | Peacock Software | United Kingdom | | |
| 78 | Peak Mathematics | United Kingdom | | |
| 79 | Peak Services | United Kingdom | | |
| 80 | Peaksoft | United Kingdom | | |
| 81 | Pearl Software | United Kingdom | | |
| 82 | Pearson PLC | | | |
| 83 | Pearsons Computing |
| 84 | PeaSea Software | | Paddy Coleman | | | | |
| 85 | Pedro Fernandez Lopez | Spain | | |
| 86 | Pedro Manuel Rodriguez Salas | Spain | | |
| 87 | Peekay Software | United Kingdom | | |
| 88 | Peeny Pad Software PLC | United Kingdom | | |
| 89 | Peet and Wil | | | |
| 90 | Pegas | | | |
| 91 | Pegasus Software | United Kingdom | | |
| 92 | Peker Computers Ltd | United Kingdom | | |
| 93 | Pelagon Software | | Gary Power | | | | |
| 94 | Penazo Soft | Spain | | |
| 95 | Penguin Books Ltd | | Pearson PLC | | | | |
| 96 | Penguin Study Software | | Literature.co.uk | | | | |
| 97 | Penna Productions | United Kingdom | | |
| 98 | Pennsoft | United Kingdom | | |
| 99 | Pensoft | United Kingdom | | |
| 100 | Pentagram Software | United Kingdom | | |
| 101 | PEP Soft S.A. | Spain | | |
| 102 | Pepsi Soft |
| 103 | Perestroika Software | Russia | | |
| 104 | Perfection Software |
| 105 | Personal Computer Games | | VNU Business Publications NV | | | | |
| 106 | Personal Computer News | | VNU Business Publications NV | | | | |
| 107 | Personal Computer World | | VNU Business Publications NV | | | | |
| 108 | Personal Software Services Ltd | | | |
| 109 | Perspective Group | Russia | Vologda | |
| 110 | Peter Lovett Ltd | United Kingdom | | |
| 111 | Peter Machala | Slovakia | | |
| 112 | Peter Machala Software | | Peter Machala | | | | |
| 113 | Peter S. Boulton | United Kingdom | | |
| 114 | Peter Turanyi | Slovakia | | |
| 115 | Petersoft | Czech Republic | | |
| 116 | Petr Vones | Czech Republic | | |
| 117 | Pevosoft |
| 118 | Phantasy | Latvia | | |
| 119 | Phantom Family | Russia | Cheboksary | |
| 120 | Phantom Family Corp | Russia | | |
| 121 | Phantom Ltd | Russia | Izhevsk | |
| 122 | Phantomsoft | Germany | | |
| 123 | Pharao Code Group | Russia | | |
| 124 | Phil Hard Productions | United Kingdom | | |
| 125 | Philip Bee | United Kingdom | | |
| 126 | Philip J. Fenton | United Kingdom | | |
| 127 | Philip M. Reynolds | United Kingdom | | |
| 128 | Philip Richmond | United Kingdom | | |
| 129 | Phipps Associates | United Kingdom | | |
| 130 | Phoenix Publishing Associates | United Kingdom | | |
| 131 | Phoenix Software Ltd | United Kingdom | | |
| 132 | Phonex Software | Poland | | |
| 133 | Pi Software | United Kingdom | | |
| 134 | Piccolo Books | | Piper Books Ltd | | | | |
| 135 | Pick & Choose | | Pick & Choose [F.G.] Ltd | | | | |
| 136 | Pick & Choose [F.G.] Ltd | | | |
| 137 | Picosoft | United Kingdom | | |
| 138 | Picturesque | United Kingdom | | |
| 139 | Pikadee Software | United Kingdom | | |
| 140 | PIM Software | Greece | | |
| 141 | Pin Soft S.A. | Spain | | |
| 142 | Pinehurst Data Studios | United Kingdom | | |
| 143 | Pinksoft | United Kingdom | | |
| 144 | Pipeq Systems | | L.W. Tomlin | | | | |
| 145 | Piper Books Ltd | | | |
| 146 | Piper Software | | Piper Books Ltd | | | | |
| 147 | Piranha | | Macmillan Publishers Ltd | | | | |
| 148 | Pirate Computing | United Kingdom | | |
| 149 | Pirate Software Ltd | | Software Publishing Associates | | | | |
| 150 | Piter Ltd | Russia | | |
| 151 | Pixel | | | |
| 152 | Pixel Productions | | Pixel Productions Multimedia Design | | | | |
| 153 | Pixel Productions Multimedia Design | | | |
| 154 | PixelSoftware | | | |
| 155 | PKCS | | Pavel Korensky Computer Software | | | | |
| 156 | Placebo | Russia | Kovrov | |
| 157 | Placet Software | United Kingdom | | |
| 158 | Planecon Informatica Ltda | | | |
| 159 | Plansoft | | Planecon Informatica Ltda | | | | |
| 160 | Planthills Ltd | | | |
| 161 | Platinum Productions | United Kingdom | | |
| 162 | Play Games Software | Spain | | |
| 163 | Playability By Design | United Kingdom | | |
| 164 | Players Premier | | Interceptor Group | | | | |
| 165 | Players Software | | Interceptor Group | | | | |
| 166 | Playgear Company | Russia | Kemerovo | |
| 167 | Playground Software | United Kingdom | | |
| 168 | Plazastar Software | United Kingdom | | |
| 169 | Plomba Software | | | |
| 170 | Plus-One Software | United Kingdom | | |
| 171 | pm | | | |
| 172 | PMCG Soft |
| 173 | Pocket Money Software | | Central Solutions | | | | |
| 174 | Polarsoft | | Jason Holt | | | | |
| 175 | Polbrit International | | Timex Inc | | | | |
| 176 | Polsoft | Poland | | |
| 177 | Polythene Soft | Spain | | |
| 178 | Pond Software Ltd | | | |
| 179 | Poolpet Software | | Wojciech Lazarski | | | | |
| 180 | Pooter Games | | | |
| 181 | Poppy Programs | United Kingdom | | |
| 182 | Poppy Soft | United Kingdom | | |
| 183 | Popular Computing Weekly | | Sunshine Publications Ltd | | | | |
| 184 | Portland Artists | | | |
| 185 | Postern Ltd | United Kingdom | | |
| 186 | POWER DiamonD Software | Russia | | |
| 187 | Power Group | Russia | Vitebsk | |
| 188 | Power of Sound | Russia | Izhevsk | |
| 189 | Power of Sound Web Team | Russia | | |
| 190 | Power Soft [1] | Germany | | |
| 191 | Power Soft [2] | Romania | | |
| 192 | Power Software S.A. | Spain | | |
| 193 | Power Systems | Russia | | |
| 194 | Powerhouse Software | United Kingdom | | |
| 195 | Powerplay | | Maynard International Ltd | | | | |
| 196 | PowerSoftware | United Kingdom | | |
| 197 | Powertran Cybernetics | United Kingdom | | |
| 198 | PR Software [1] | United Kingdom | | |
| 199 | Practical Software | United Kingdom | | |
| 200 | Precision Games | United Kingdom | | |
| 201 | Precision Group | Belarus | | |
| 202 | Precision Software Engineering |
| 203 | Predator Software | Czech Republic | | |
| 204 | Predatory Group | Russia | | |
| 205 | Preisler Industries | Poland | | |
| 206 | Premier Corp | Ukraine | Simferopol | |
| 207 | Premier Corp. | Russia | | |
| 208 | Premier Software | United Kingdom | | |
| 209 | Premium Software | | Power Software S.A. | | | | |
| 210 | Prentice-Hall International | | Pearson PLC | | | | |
| 211 | Prestel Tapezine | United Kingdom | | |
| 212 | Prestige Group | Russia | | |
| 213 | Pricing Building Works | United Kingdom | | |
| 214 | Pride Utilities | United Kingdom | | |
| 215 | Prime Software | United Kingdom | | |
| 216 | PrImer Educational Software | United Kingdom | | |
| 217 | Primitive Software | Poland | | |
| 218 | Primosoft | Netherlands | | |
| 219 | PrimyGames | | | |
| 220 | Print'n'Plotter Products Ltd | United Kingdom | | |
| 221 | Prism Leisure Corporation PLC | United Kingdom | | |
| 222 | PRISM Micro-informatique S.A. | France | | |
| 223 | Prisma Software | United Kingdom | | |
| 224 | Prisoners | Slovakia | | |
| 225 | Pro Hackers Dynasty | Belarus | Minsk | |
| 226 | Pro Soft | Russia | | |
| 227 | Probe Software Ltd | United Kingdom | | |
| 228 | Proceeding Electronic System | Italy | | |
| 229 | Procom Software | United Kingdom | | |
| 230 | Producciones Cicero S.A. | Spain | | |
| 231 | Productive Playtime | United Kingdom | | |
| 232 | Proein S.A. | | | |
| 233 | Proein Soft Line | | Proein S.A. | | | | |
| 234 | Professional Software | United Kingdom | | |
| 235 | Professional Software Users | Russia | | |
| 236 | Profi Code Computers Club | Russia | Izhevsk | |
| 237 | Profisoft [1] | | Profisoft GmbH | | | | |
| 238 | Profisoft [2] |
| 239 | Profisoft GmbH | | | |
| 240 | Profsoft | Czech Republic | | |
| 241 | Program Direct | United Kingdom | | |
| 242 | Program Factory | United Kingdom | | |
| 243 | Program Power | United Kingdom | | |
| 244 | Program Techniques | United Kingdom | | |
| 245 | Programmers Group | Russia | Tula | |
| 246 | Progress | Russia | Moscow | |
| 247 | Progress Software | United Kingdom | | |
| 248 | Progress Software Makers Team | Russia | | |
| 249 | Progressive Distribution Ltd | | | |
| 250 | Project of Fire | Spain | | |
| 251 | Prollcoder | Germany | | |
| 252 | Prometeo | Italy | | |
| 253 | Propaganda Software |
| 254 | Prophecy | Belarus | Minsk | |
| 255 | Prophics Software | Czech Republic | | |
| 256 | PROSM Software |
| 257 | PROSM Software |
| 258 | Prospect Software | United Kingdom | | |
| 259 | Prospek Computing Coorperation | Germany | | |
| 260 | Prospero Software | United Kingdom | | |
| 261 | Protek Computing Ltd | United Kingdom | | |
| 262 | Proxima Centauri | Russia | Kovrov | |
| 263 | Proxima Software | | Proxima Software Ltd | | | | |
| 264 | Proxima Software | Czech Republic | Ústí nad Labem | |
| 265 | Proxima Software Ltd | | | |
| 266 | Prune Software | United Kingdom | | |
| 267 | Pryac Software | United Kingdom | | |
| 268 | Psian Software Ltd | Russia | | |
| 269 | Psion Computers | | | |
| 270 | Psion Computing | | | |
| 271 | Psion PLC | | | |
| 272 | Psion Software Ltd | | Psion PLC | | | | |
| 273 | PSS | | Personal Software Services Ltd | | | | |
| 274 | Psy-Sci | United Kingdom | | |
| 275 | Psychaedelic Hedgehog Software | | Andrey John Remic | | | | |
| 276 | Psychic Software | United Kingdom | | |
| 277 | Psycho | | | |
| 278 | Psychosoft | United Kingdom | | |
| 279 | Psyclapse | | Psygnosis Ltd | | | | |
| 280 | Psygnosis Ltd | | Sony Inc | | | | |
| 281 | Psytronik Software | | | |
| 282 | PTsoft | Spain | | |
| 283 | Puffin Books | | Penguin Books Ltd | | | | |
| 284 | Purple Studios | Spain | | |
| 285 | Purple Unicorn Software | | Steve Dixon | | | | |
| 286 | PVA-Soft | Russia | | |
| 287 | PW Marketing | United Kingdom | | |
| 288 | PW Publishing Ltd | | IPC Magazines Ltd | | | | |
| 289 | Pwinz | | | |
| 290 | Pyramid Software | United Kingdom | | |
