| 1 | C&VG | EMAP Business & Computer Publications Ltd | United Kingdom | |
| 2 | C&VG (Gamebook) | | | |
| 3 | C-Tech | | United Kingdom | |
| 4 | C.C.Guys | | Hungary | |
| 5 | C.P.S. Games | Chameleon Computer Games | United Kingdom | |
| 6 | C.S.D. Co Ltd | | United Kingdom | |
| 7 | C.S.V. Company | | | |
| 8 | C.Servis Games | | | |
| 9 | C64CD Studios | | | |
| 10 | Cable Software | | United Kingdom | |
| 11 | Cabsoft | Computer Cabin | | |
| 12 | Cactus | | United Kingdom | |
| 13 | Cadsoft | | United Kingdom | |
| 14 | Calisto | Calisto Software Ltd | | |
| 15 | Calisto Software Ltd | | | |
| 16 | calodox | | | |
| 17 | Calpac Computer Software | | United Kingdom | |
| 18 | Cambic Software | | United Kingdom | |
| 19 | Cambridge Computing Research Ltd | | United Kingdom | |
| 20 | Cambridge Micro Software | | United Kingdom | |
| 21 | Cambridge Microcomputer Centre | | United Kingdom | |
| 22 | Cambridge Microelectronics | | United Kingdom | |
| 23 | Cambridge Research | | | |
| 24 | Camden Council | | United Kingdom | |
| 25 | Camel Micros | | United Kingdom | |
| 26 | Camel Products | Cambridge Microelectronics | United Kingdom | |
| 27 | Camel Software | | United Kingdom | |
| 28 | Campbell Systems | | United Kingdom | |
| 29 | Campion Software | | Denmark | |
| 30 | Canaan Software | | United States | |
| 31 | Cande Software | | Spain | |
| 32 | Candy Says | | | |
| 33 | Cannonball | | Russia | |
| 34 | Canvas | | United Kingdom | |
| 35 | Capcom | | | |
| 36 | Capsoft | ThunderWare Research Center | Netherlands | |
| 37 | Cardex | | United Kingdom | |
| 38 | Caris Software | | United Kingdom | |
| 39 | Carnell Software Ltd | | United Kingdom | |
| 40 | Carol & Paul Bradbury | | United Kingdom | |
| 41 | Carrier Bag Software | | | |
| 42 | Carrium Software | | United Kingdom | |
| 43 | Carter Follis Software Associates | | United Kingdom | |
| 44 | Cartoon Time | | | |
| 45 | Cascade Games Ltd | Artronic Products Ltd | United Kingdom | |
| 46 | Cases Computer Simulations Ltd | | | |
| 47 | Casey Bee Games | | United Kingdom | |
| 48 | Cassell Ltd | Holt Saunders Ltd | | |
| 49 | Cassiopeia | | Slovakia | |
| 50 | Castle Software | | United Kingdom | |
| 51 | Castor Cracking Group | | Sweden | Stockholm |
| 52 | Casventures Ltd | | United Kingdom | |
| 53 | Catalunya Radio | | | |
| 54 | Catalyst Coders | | United Kingdom | |
| 55 | Cathedral Software | | United Kingdom | |
| 56 | Cavern Software | | United Kingdom | |
| 57 | CBM | | Czech Republic | |
| 58 | CCP Software | | United Kingdom | |
| 59 | CCS | Cases Computer Simulations Ltd | | |
| 60 | CDS Microsystems | Guildhall Leisure | | |
| 61 | CDT Productions | | United Kingdom | |
| 62 | Ce-Soft | | Czech Republic | |
| 63 | Celerysoft | | United Kingdom | |
| 64 | Celina Ltd | | United Kingdom | |
| 65 | Celtic Revision Software | | United Kingdom | |
| 66 | Celtic Software | | United Kingdom | |
| 67 | Celyn Jones Software | | United Kingdom | |
| 68 | Centas | | Spain | |
| 69 | Centaurisoft | | United Kingdom | |
| 70 | Central Solutions | | United Kingdom | |
| 71 | Centre Divulgador de la Informatica | Generalitat de Catalunya | | |
| 72 | CentreSoft | | United Kingdom | |
| 73 | Centronics | | Russia | Moscow |
| 74 | Centronics Group | | | |
| 75 | Century | | | |
| 76 | Century City Software Ltd | | United Kingdom | |
| 77 | Century Communications | | | |
| 78 | Century Communications Ltd | Century Publishing Co. Ltd | | |
| 79 | Century Publishing Co. Ltd | | | |
| 80 | Century Software | Power Software S.A. | Spain | |
| 81 | Century Software | | | |
| 82 | Ceran Software | | United Kingdom | |
| 83 | Cerikopik Software Inc. | | Belarus | Brest |
| 84 | CEZ | Computer Emuzone Games Studio | Spain | |
| 85 | CEZGS | Computer Emuzone Games Studio | Spain | |
| 86 | CGH Services | | | |
| 87 | Chad Software | | United Kingdom | |
| 88 | Chainik Hackers Group | | Russia | |
| 89 | Chalksoft Ltd | | United Kingdom | |
| 90 | Challenge Software | | United Kingdom | |
| 91 | Chameleon Computer Games | | United Kingdom | |
| 92 | Chameleon Computers Ltd | | United Kingdom | |
| 93 | Chance Soft | | Slovakia | |
| 94 | Channel 4 Television | | United Kingdom | |
| 95 | Channel 8 Software | | United Kingdom | |
| 96 | Chaos Energy Group | | Russia | Yoshkar-Ola |
| 97 | Chaotic Soft | | Czech Republic | |
| 98 | Chapman and Beckingham Software | | United Kingdom | |
| 99 | Charles Letts & Co | | United Kingdom | |
| 100 | Charlton Tutorials | | United Kingdom | |
| 101 | Charly Computers Ltd | | Germany | |
| 102 | Charly Records | | United Kingdom | |
| 103 | Checkpoint | | France | Orléans |
| 104 | Cheep Games | | United Kingdom | |
| 105 | Cheese Freak Software | | United Kingdom | |
| 106 | Cheetah International Ltd | | | |
| 107 | Cheetah Marketing Ltd | Cheetah International Ltd | | |
| 108 | CheetahSoft Ltd | Cheetah International Ltd | | |
| 109 | ChemneSoft | | Russia | Ufa |
| 110 | ChemneSoft Plus | | Russia | Ufa |
| 111 | Cheshire Micro Design | | United Kingdom | |
| 112 | Cheveron Group | | | |
| 113 | Chewsoft | | United Kingdom | |
| 114 | Chezron Software | Fidcal | United Kingdom | |
| 115 | Chi-Soft | | | |
| 116 | Chibur | | United Kingdom | |
| 117 | Children of Lt. Shmidt | | Russia | Chelyabinsk |
| 118 | Childrens Infatuated Computers | | Russia | |
| 119 | Childsplay Software | | United Kingdom | |
| 120 | ChildWare Corporation | | United States | |
| 121 | Chips Software | | Spain | |
| 122 | Choice Software Ltd | | United Kingdom | |
| 123 | Chorrigames 2020 | | | |
| 124 | Christopher James Software Ltd | | United Kingdom | |
| 125 | Chromasoft | | United Kingdom | |
| 126 | Church Army | | | |
| 127 | Church Army Resource Centre | Church Army | | |
| 128 | Church of Scotland Education Software | | United Kingdom | |
| 129 | Church of the Latter Day Speccy | | United Kingdom | |
| 130 | CHURROSOFT | | | |
| 131 | CI5 The Amaters | | Czech Republic | |
| 132 | Cibercomp S.A. | | Spain | |
| 133 | Ciberne Software | | Brazil | |
| 134 | Cibernesis | | Spain | |
| 135 | Cibertron Software | | Brazil | |
| 136 | CIDsoft | MS-CID | Czech Republic | |
| 137 | CIR | | Germany | |
| 138 | Circulo de Soft | Microamigo S.A. | | |
| 139 | Citizen Software | | United Kingdom | |
| 140 | Ciudadela Software | | Spain | |
| 141 | Ckazka Entertainment | | | |
| 142 | Clarity Software Ltd | | United Kingdom | |
| 143 | Clasic Software | | Czech Republic | |
| 144 | Class Games | | United Kingdom | |
| 145 | Classic Conflicts | | | |
| 146 | Classic Software | | United Kingdom | |
| 147 | Classic Software | | Czech Republic | |
| 148 | CLAW | | Poland | |
| 149 | Cleva Computerware | | United Kingdom | |
| 150 | Clever Music | | United Kingdom | |
| 151 | Clevers Group | | Russia | Chelyabinsk |
| 152 | CLJ Industries | | France | |
| 153 | Clockwize | | United Kingdom | |
| 154 | Cloud 10 Software | | United Kingdom | |
| 155 | Cloud 9 Software | | United Kingdom | |
| 156 | Cloud Soft | | Belarus | |
| 157 | Clover Services | | United Kingdom | |
| 158 | Club Software | | United Kingdom | |
| 159 | Clwyd Adventure Software | | United Kingdom | |
| 160 | CNGSoft | | Spain | |
| 161 | Cobra Computer Software | | United Kingdom | |
| 162 | Cobra Soft | | Ukraine | |
| 163 | Cobra Soft | | | |
| 164 | Cobra Software | | Ukraine | |
| 165 | Cocasoft | | Spain | |
| 166 | Cochique&Chichari Soft | | | |
| 167 | Code Bastards Hackers Group | | Ukraine | Kharkiv |
| 168 | Code Blaster Group | | | |
| 169 | Code Blasters | Code Blaster Group | | |
| 170 | Code Busters | | Ukraine | Kharkiv |
| 171 | Code Gangsters Group | | Russia | Nizhny Tagil |
| 172 | Code Masters Gold | Codemasters Ltd | | |
| 173 | Code Masters Ltd | Codemasters Ltd | | |
| 174 | Code Masters Plus | Codemasters Ltd | | |
| 175 | Code Monkeys | | | |
| 176 | Code Monsters | | Russia | Omsk |
| 177 | Code Rapers Group | | Russia | Saransk |
| 178 | Code Reingers Group | | Ukraine | Kharkiv |
| 179 | Codebusters | Code Busters | Ukraine | Kharkiv |
| 180 | Codefuckers | | Russia | Moscow |
| 181 | Codemasters Ltd | | | |
| 182 | Codemonsters Hackers Group | | Ukraine | Lviv |
| 183 | CodeRaizers | | Russia | Chelyabinsk |
| 184 | Coders' Academy Interactive Group | | Russia | Taganrog |
| 185 | Codex Group | | Russia | Ryazan |
| 186 | Codex Software | Codex Group | Russia | Ryazan |
| 187 | Codigo Software | | Spain | |
| 188 | Coding Kings Software | | Russia | |
| 189 | Cogitare Computing | | | |
| 190 | Cognito Software | | | |
| 191 | Collins Computing | | | |
| 192 | Collins Educational Ltd | | United Kingdom | |
| 193 | Collins Soft | Collins Educational Ltd | United Kingdom | |
| 194 | Colne Robotics Co Ltd | | United Kingdom | |
| 195 | Colonel Charisma Team | | United Kingdom | |
| 196 | Color of Magic | Colour of Magic | Russia | Vladivostok |
| 197 | Colossoft Research | | Ukraine | |
| 198 | Colour of Magic | | Russia | Vladivostok |
| 199 | Colourmatic Computing | | | |
| 200 | Coma Software | | United Kingdom | |
| 201 | CoMAD Soft | | Argentina | |
| 202 | Comet Software | | United Kingdom | |
| 203 | Comix | | | |
| 204 | Comix Company | | Russia | Yoshkar-Ola |
| 205 | Command Software | | | |
| 206 | Commodore Plus | | Spain | |
| 207 | Companion Software | | United Kingdom | |
| 208 | Compass Software | | | |
| 209 | Compiler Software | | Spain | |
| 210 | Compiuter Soft | | Spain | |
| 211 | CompoWellcome | | Uzbekistan | |
| 212 | Compu-Studio Ltd | | Ukraine | Myrnohrad |
| 213 | Compuden Software | | United Kingdom | |
| 214 | Compulogical S.A. | | Spain | |
| 215 | Compumania | | Spain | |
| 216 | Compusound | | United Kingdom | |
| 217 | Computascope for Fun | | United Kingdom | |
| 218 | Computasolve | | United Kingdom | |
| 219 | Computer | | Russia | |
| 220 | Computer & Software Centre | | United Kingdom | |
| 221 | Computer Adventure | | | |
| 222 | Computer Adventure Studio | | Poland | |
| 223 | Computer Cabin | | | |
| 224 | Computer Choice | | United Kingdom | |
| 225 | Computer Emuzone | Computer Emuzone Games Studio | Spain | |
| 226 | Computer Emuzone Games Studio | | Spain | |
| 227 | Computer Forces Hackers Group | | | |
| 228 | Computer Gamer | | | |
| 229 | Computer Games | | Finland | |
| 230 | Computer Kontakt | Rätz-Eberle Verlag | | |
| 231 | Computer Magic | | United Kingdom | |
| 232 | Computer Novels | | Sweden | |
| 233 | Computer Publications | | United Kingdom | |
| 234 | Computer Rating Methods | | United Kingdom | |
| 235 | Computer Rats Group | | Russia | Kurgan |
| 236 | Computer Records | | United Kingdom | |
| 237 | Computer Service Ltd | | | |
| 238 | Computer Services | | United Kingdom | |
| 239 | Computer Tutor | | | |
| 240 | Computer Wares | | United Kingdom | |
| 241 | Computer Wargame Corporation | | United Kingdom | |
| 242 | Computer Work Company | | Russia | Rostov-on-Don |
| 243 | Computerhouse [UK] Ltd | | United Kingdom | |
| 244 | Computeristic | | United Kingdom | |
| 245 | Computerlock | | United Kingdom | |
| 246 | Computermania | | Uruguay | |
| 247 | Computerposter | | Germany | |
| 248 | Computers for Education | | United Kingdom | |
| 249 | Computerworld | | United Kingdom | |
| 250 | Computing Today | | | |
| 251 | Computronic | | Germany | |
| 252 | ComTec | | United Kingdom | |
| 253 | Concept Animations | | United Kingdom | |
| 254 | Concept Software Ltd | | United Kingdom | |
| 255 | Concern Chaos | | Russia | St.Petersburg |
| 256 | Concrete Digital Designs | | Spain | |
| 257 | Conradorre Soft | | Poland | |
| 258 | Conscience | | | |
| 259 | Consciousness | | Ukraine | |
| 260 | Consolidated Software Marketing Ltd | | United Kingdom | |
| 261 | Constellation International Association | | Russia | Kirovsk |
| 262 | Consult Computer Systems | Consult Software Ltd | United Kingdom | |
| 263 | Consult Software Ltd | | United Kingdom | |
| 264 | Consumers' Association | | United Kingdom | |
| 265 | Continental Software | | United Kingdom | |
| 266 | Contrast Software | | United Kingdom | |
| 267 | Control Software | | Ireland | |
| 268 | Convention | | United Kingdom | Yeovil |
| 269 | Coo Coo Soft | | Czech Republic | |
| 270 | Cool Guyz Company | | Russia | Chelyabinsk |
| 271 | Coolguys Ltd | | United Kingdom | |
| 272 | Copper Feet | | Russia | St.Petersburg |
| 273 | Copy Masters | | Russia | Kaluga |
| 274 | Copyright Control | | | |
| 275 | Coral Software | | Poland | |
| 276 | CORE Design Ltd | | United Kingdom | |
| 277 | Cornhill Services | | United Kingdom | |
| 278 | Cornsoft | Cornsoft Group Inc | | |
| 279 | Cornsoft Group Inc | | | |
| 280 | Corona Studio | | Russia | Ufa |
| 281 | Corporation AS/DS | | | |
| 282 | Corpse Group | | | |
| 283 | Corwen Computer Systems | | United Kingdom | |
| 284 | Cosine | | Germany | Leipzig |
| 285 | Cosine Systems | | United Kingdom | |
| 286 | Cosmic | | | |
| 287 | Cosmic Software | | United Kingdom | |
| 288 | Cosmix | | Russia | Moscow |
| 289 | COSMOS designers | | | |
| 290 | Cottage Computing | | United Kingdom | |
| 291 | Courbois Software | | Netherlands | |
| 292 | Court Software | | United Kingdom | |
| 293 | Cowl Systems | | United Kingdom | |
| 294 | Coxsoft | missing | | |
| 295 | CP Software | | United Kingdom | |
| 296 | CPL Computer Plus Soft GmbH | | Germany | |
| 297 | CPL Computing | | United Kingdom | |
| 298 | CPS Hackers Group | | Russia | Moscow |
| 299 | Craccer Software Team | | Denmark | |
| 300 | Cracked Masters Group | | | |
| 301 | Cracking Software | | United Kingdom | |
| 302 | Craft Ware | | Russia | Yegoryevsk |
| 303 | Craig Communications Ltd | | United Kingdom | |
| 304 | Craigmount Computer Centre | | United Kingdom | |
| 305 | Cramsoft | | | |
| 306 | Crapsoft | Erik vh | Belgium | |
| 307 | CrapTeam | | | |
| 308 | Crash | Newsfield Publications Ltd | United Kingdom | |
| 309 | Crasher Hacker Group | | | |
| 310 | Crazy Pixels Group | | | |
| 311 | Crazy Soft | | Spain | |
| 312 | Crazy Studio | | Russia | St.Petersburg |
| 313 | Crazytronic | | Czech Republic | Znojmo |
| 314 | CRC Software | | United Kingdom | |
| 315 | Cream Computers | | United Kingdom | |
| 316 | Create Soft | | Russia | St.Petersburg |
| 317 | Creative Computing | | Germany | |
| 318 | Creative Computing Press | | United States | |
| 319 | Creative Corporation Zhuki | | Ukraine | Kharkiv |
| 320 | Creative Edge | | United Kingdom | |
| 321 | Creative Juices | | United Kingdom | |
| 322 | Creative Materials Ltd | | United Kingdom | |
| 323 | Creative Micro Stimulation | | United Kingdom | |
| 324 | Creative Reality | | United Kingdom | |
| 325 | Creative Sparks | Thorn EMI Video Ltd | United Kingdom | |
| 326 | Creative Technology Group Ltd | | United Kingdom | |
| 327 | Creative Technology Institute | | Denmark | |
| 328 | Creative.Radical.Alternative.Production Games | | United Kingdom | |
| 329 | Creativos Editoriales S.A. | | Spain | |
| 330 | Creators Group | | Moldova | Chișinău |
| 331 | Creepsoft | | Spain | |
| 332 | Crescent | | Turkey | Istanbul |
| 333 | Crest | | Germany | |
| 334 | CrisiSofT | | Netherlands | |
| 335 | Critical Mass | | Russia | Rostov-on-Don |
| 336 | CRL | Online PLC | United Kingdom | |
| 337 | CRL Group PLC | Online PLC | United Kingdom | |
| 338 | Crom Software | | Spain | |
| 339 | Cronosoft | | United Kingdom | |
| 340 | Cronosoft | | Spain | |
| 341 | Cropthorne Software | | United Kingdom | |
| 342 | Cross Software | | United Kingdom | |
| 343 | Cross Technics | | Sweden | |
| 344 | Cross-Road | | Russia | Vsevolozhsk |
| 345 | Crossword | | | |
| 346 | Crowd Company | | Russia | Krasnodar |
| 347 | Crusader Computing | | United Kingdom | |
| 348 | Crush Group | | Ukraine | Dnepropetrovsk |
| 349 | Crushers | | Latvia | Jelgava |
| 350 | Crystal Computing | Design Design Software | United Kingdom | |
| 351 | Crystal Dream | | Ukraine | Lugansk |
| 352 | Crysys | Software Publishing Associates | United Kingdom | |
| 353 | CSL Microdata | | United Kingdom | |
| 354 | CSP Systems | | United Kingdom | |
| 355 | Csucstechnika | | Hungary | |
| 356 | Cult Games | D&H Games | United Kingdom | |
| 357 | CulturaChip | | Spain | |
| 358 | Culture Club | | | |
| 359 | Currah Computer Components Ltd | DK'Tronics Ltd | United Kingdom | |
| 360 | Currys | | United Kingdom | |
| 361 | Curtis Jacobs Software Design Ltd | | United Kingdom | |
| 362 | Custom Cables International Ltd | Add-On Electronics Ltd | United Kingdom | |
| 363 | Custom Software | | United Kingdom | |
| 364 | CustomData Ltd | | United Kingdom | |
| 365 | CV Software | | Czech Republic | |
| 366 | Cybadyne | | United Kingdom | |
| 367 | Cyber Corporation | | Russia | Krasnodar |
| 368 | Cyber Dreams Software | | Russia | Ivanovo |
| 369 | Cyber Team | | Russia | Iskitim |
| 370 | Cyberax Software | | Russia | Kemerovo |
| 371 | Cybercon Enterprises | | United Kingdom | |
| 372 | Cyberex Dream | | | |
| 373 | Cybernetic Applications Ltd | | United Kingdom | |
| 374 | Cyberprog New Media | | | |
| 375 | CyberPunks Unity | | Russia | Rybinsk |
| 376 | Cybertronic Soft | | Russia | Moscow |
| 377 | Cybexlab Software | | Czech Republic | |
| 378 | Cyclone | | United Kingdom | |
| 379 | Cygnus | missing | | |
| 380 | Cygnus Software | | United Kingdom | |
| 381 | CYP | | Russia | Komsomolsk-na-Amure |
| 382 | Czerweny Electronica S.A.I.C. | | Argentina | |
| 383 | ЦННТМ "Эврика" | | Russia | Saransk |
| 384 | Церикопик | Cerikopik Software Inc. | Belarus | Brest |
