| 1 | M and G Corp | | Russia | Moscow |
| 2 | M Meerman Design | | | |
| 3 | M&H Software | | United Kingdom | |
| 4 | M&H Software | | United Kingdom | |
| 5 | M&J Regan Software | | United Kingdom | |
| 6 | M&J Regan Software | | United Kingdom | |
| 7 | M&J Software | | United Kingdom | |
| 8 | M&J Software | | United Kingdom | |
| 9 | M. Angel Rios Domingo | | Spain | |
| 10 | M. Gerhard | | | |
| 11 | M.42 Software | Neil Talbott | United Kingdom | |
| 12 | M.A. Lovell | | United Kingdom | |
| 13 | M.A. Lovell Software | M.A. Lovell | United Kingdom | |
| 14 | M.A. Smith | | United Kingdom | |
| 15 | M.A.L. Programing Ltd | | Russia | Volgodonsk |
| 16 | M.A.P. Publications | | | |
| 17 | M.A.P. Software | M.A.P. Publications | | |
| 18 | M.B. Software | | United Kingdom | |
| 19 | M.C. Lothlorien | | | |
| 20 | M.C.Lothlorien | | | |
| 21 | M.E.L. Chip Club | | Croatia | |
| 22 | M.G.B. Software | | Poland | |
| 23 | M.I. Turner and Son | | United Kingdom | |
| 24 | M.I. Turner and Son | | United Kingdom | |
| 25 | M.K. Circuits | | United Kingdom | |
| 26 | M.K. Circuits | | United Kingdom | |
| 27 | M.K.Circuits | | | |
| 28 | M.M.A Soft | | Russia | |
| 29 | M.N. Soft | missing | | |
| 30 | M.R.Software | | | |
| 31 | M.W. Holman | | | |
| 32 | M.Z. Production | | | |
| 33 | Macbride | missing | | |
| 34 | Machinecraft Ltd | | United Kingdom | |
| 35 | Maciej Zielinski | | | |
| 36 | Macmillan Education Ltd | | United Kingdom | |
| 37 | Macmillan Publishers Ltd | | | |
| 38 | Macmillan Software Ltd | Macmillan Publishers Ltd | | |
| 39 | Macmillan Software Ltd | | | |
| 40 | Macronics Systems Ltd | | United Kingdom | |
| 41 | Macsen Software | | United Kingdom | |
| 42 | Macsoft | | United Kingdom | |
| 43 | MAD AXE (AndySoft) | | | |
| 44 | Mad Code Hacker Group | | | |
| 45 | Mad Code Hackers Group | | | |
| 46 | Made in Spain | missing | | |
| 47 | Made in Spain | | | |
| 48 | Madhouse | | | |
| 49 | MadMax [1] | missing | | |
| 50 | Madness Coders | | | |
| 51 | Madness Coders Group | | | |
| 52 | MADSOFT | | | |
| 53 | Maelstrom Games Ltd | | United Kingdom | |
| 54 | Maestro Group | | | |
| 55 | Mafia | | | |
| 56 | Mafia P.C. | | Ukraine | |
| 57 | Mafia Private Corporation | | Ukraine | Kharkiv |
| 58 | Maggisoft | | | |
| 59 | Magic | | | |
| 60 | Magic Bytes | | Germany | |
| 61 | Magic Hand | | Spain | |
| 62 | Magic Moon | | Ukraine | |
| 63 | Magic Post Box | | United Kingdom | |
| 64 | Magic Realm Games | | United Kingdom | |
| 65 | Magic Soft | | Russia | Moscow |
| 66 | Magic Soft [2] | | Russia | |
| 67 | Magic Software | | United Kingdom | |
| 68 | Magic Studio | | | |
| 69 | Magic Team | Software Center S.A. | Spain | |
| 70 | MagicMaster Software | Rastislav Misecka | Slovakia | |
| 71 | Magicsoft [1] | | United Kingdom | |
| 72 | Magination Software | | United Kingdom | |
| 73 | Magination Software | missing | | |
| 74 | Magnetic Fields | | United Kingdom | |
| 75 | Magnetic Magazines Ltd | | | |
| 76 | Magnetic Monsters | | Russia | Sarapul |
| 77 | Magnetic Scrolls Ltd | | United Kingdom | |
| 78 | Magnificent 7 Software | | United Kingdom | |
| 79 | Magnum Computing | | United Kingdom | |
| 80 | Magnum Computing | | United Kingdom | |
| 81 | Magnum Electronics | | United Kingdom | |
| 82 | Magnum Electronics | | United Kingdom | |
| 83 | Majasoft | | Czech Republic | |
| 84 | Major Developments | | United Kingdom | |
| 85 | MAK Computer Graphics | missing | | |
| 86 | Malan Associates | | United Kingdom | |
| 87 | Malcolm Kirk | | United Kingdom | |
| 88 | Maldon Archaeological Group | | United Kingdom | |
| 89 | Maldon Archaeological Group | | United Kingdom | |
| 90 | Malen Ltd | | Russia | Voronezh |
| 91 | MaLINOWKA PRODUKTIONS | | Russia | Malinovka |
| 92 | MALSoft | | | |
| 93 | Malva Ltd | | United Kingdom | |
| 94 | Mama Software | | Germany | |
| 95 | Man Software | Cesar Hernandez Bano | Spain | |
| 96 | Mandala Breakers | | Czech Republic | |
| 97 | Mandarin Software | missing | | |
| 98 | Mandragora Software | | Spain | |
| 99 | Manfred Nolton | | Germany | |
| 100 | Manic Miner Technologies | | Norway | |
| 101 | Manic Miner Technologies | | Norway | |
| 102 | Manjinder Rai | Manjinder Singh | | |
| 103 | Manjinder Singh | | | |
| 104 | Manor Software | | United Kingdom | |
| 105 | Manowar Software | | Russia | |
| 106 | Mansfield Computers & Electronics | | United Kingdom | |
| 107 | Manuel Soft | | Czech Republic | |
| 108 | MAP Studio | | Belarus | Minsk |
| 109 | Maparo Soft | | Netherlands | |
| 110 | Mapasoft | | Poland | |
| 111 | Mar Entertainment | | Spain | |
| 112 | MaRaf Software | | | |
| 113 | March Cats | | Russia | Ulyanovsk |
| 114 | March Cats | | Russia | |
| 115 | Mariano E.M. Chiaverano | | Argentina | |
| 116 | Marisoft | | Italy | |
| 117 | Mark Alexander | | United Kingdom | |
| 118 | Mark Cantrell | | United Kingdom | |
| 119 | Mark Foley | | Ireland | |
| 120 | Mark Foley Productions | Mark Foley | Ireland | |
| 121 | Mark Time Ltd | Mark Alexander | United Kingdom | |
| 122 | Mark Time Ltd | | | |
| 123 | Marks & Spencer | | United Kingdom | |
| 124 | Marks & Spencer | | United Kingdom | |
| 125 | Marksman Software | | United Kingdom | |
| 126 | Marlin Games | missing | | |
| 127 | Marmalade Software | | United Kingdom | |
| 128 | Marolli-Soft | | United Kingdom | |
| 129 | Marshall Cavendish Ltd | | | |
| 130 | Martech | Martech Games Ltd | United Kingdom | |
| 131 | Martech Games Ltd | Software Communications Ltd | United Kingdom | |
| 132 | Martech Games Ltd | | United Kingdom | |
| 133 | Martijn Groen | | | |
| 134 | Martin Dunitz Ltd | | United Kingdom | |
| 135 | Martin Freemantle | | United Kingdom | |
| 136 | Martin Hajduch | | Slovakia | |
| 137 | Martin Page | | United Kingdom | |
| 138 | Martin Vodicka | | Czech Republic | |
| 139 | Martinsoft | | United Kingdom | |
| 140 | Master Computer Company | | | |
| 141 | Master Copy Ltd | | | |
| 142 | Master HCG | | | |
| 143 | Master Home Computer Group | | Russia | Dzerzhinsk |
| 144 | Master Home Computers Group | | Russia | Dzerzhinsk |
| 145 | Master Software Ltd | | | |
| 146 | MasterCoder | | | |
| 147 | Masters Company Ltd | | | |
| 148 | Masters Games | missing | | |
| 149 | Masters Of Magic | | | |
| 150 | Masters of Memory | | Russia | Velikiy Novgorod |
| 151 | Masters of the Universe | | | |
| 152 | Masters of the Universe | | | |
| 153 | Masters Of Universe | | Poland | |
| 154 | Mastertronic Added Dimension | Titus | France | |
| 155 | Mastertronic Ltd | Titus | France | |
| 156 | Mastertronic Plus | Titus | France | |
| 157 | Mastervision | missing | | |
| 158 | Mastress Software | | Spain | |
| 159 | MastSoft | | Ukraine | |
| 160 | Matand Software | | United Kingdom | |
| 161 | Matand Software | missing | | |
| 162 | Matasoft | | | |
| 163 | Matasoft | Michal Matejka | | |
| 164 | Matlasoft | | Czech Republic | |
| 165 | Matra Computer Automations | | Spain | |
| 166 | Matrix Software | | United Kingdom | |
| 167 | Matt Neale | | United Kingdom | |
| 168 | Mattel Inc | | United States | |
| 169 | Matthew Holmes | | United Kingdom | |
| 170 | Matthew Westcott | | United Kingdom | |
| 171 | Matthew Wilson | | United Kingdom | |
| 172 | Max Entertainment Inc. | | Russia | |
| 173 | Max Ltd | | | |
| 174 | Maxisoft | | Russia | |
| 175 | Maxsoft&Stars of Keladan | | | |
| 176 | Maxware Corp. | | Russia | |
| 177 | Maxware Group | | Russia | |
| 178 | Maxwell Technology Ltd | | United Kingdom | |
| 179 | Mayday Software | | United Kingdom | |
| 180 | Mayfield Products | | United Kingdom | |
| 181 | Mayfield Products | | United Kingdom | |
| 182 | Mayhem | | Russia | Tula |
| 183 | Maynard International Ltd | | | |
| 184 | MB Maniax | | Czech Republic | Prague |
| 185 | mborik | | | |
| 186 | MBs Group | | Belarus | Gomel |
| 187 | MC Breakers | | | |
| 188 | MC Lothlorien | | | |
| 189 | MC Lothlorien Ltd | Icon Design Ltd | United Kingdom | |
| 190 | MC Lothlorien Ltd | | United Kingdom | |
| 191 | MC Microcomputer | | Italy | |
| 192 | MC Microcomputer | | Italy | |
| 193 | MCC | Monaco Computing Corporation | | |
| 194 | McGraw-Hill Book Company UK Ltd | | United Kingdom | |
| 195 | MCI Iberica S.A. | | Spain | |
| 196 | McLoughlin & Co | | United Kingdom | |
| 197 | McLoughlin & Co | | United Kingdom | |
| 198 | MCM Software S.A. | missing | | |
| 199 | MCN Software [1] | | Netherlands | |
| 200 | MCN Software [2] | | United Kingdom | |
| 201 | McNeil Software | | United Kingdom | |
| 202 | MCP Co | | United Kingdom | |
| 203 | MCR69 Software | | | |
| 204 | MD Software | Vivid Image | United Kingdom | |
| 205 | MD Software | | | |
| 206 | MDA Modon Associates Ltd | | United Kingdom | |
| 207 | MDR | | United Kingdom | |
| 208 | Meadowmarsh Software | | United Kingdom | |
| 209 | Meastrosoft | | United Kingdom | |
| 210 | Mediandroid | | United Kingdom | |
| 211 | Medsoft | | United Kingdom | |
| 212 | Mega | | | |
| 213 | Mega Byte | | | |
| 214 | Mega Byte Group | | Russia | Krasnodar |
| 215 | Mega Center Group | | Russia | Goryachy Klyuch |
| 216 | Mega-Soft [2] | | United Kingdom | |
| 217 | Megabaund Hackers Club | | Russia | Kirov |
| 218 | Megacode | | Russia | Vladimir |
| 219 | Megacode | | | |
| 220 | Megacode Hackers Group | | Russia | |
| 221 | Megacode Hackers Group | | Russia | |
| 222 | MegaDate Group | | Russia | Moscow |
| 223 | Megadodo Software | | United Kingdom | |
| 224 | Megaforce Group | | Russia | Moscow |
| 225 | Megaforce Hackers Group | | Russia | Moscow |
| 226 | Megapoints Corner | | United Kingdom | |
| 227 | Megasoft [1] | missing | | |
| 228 | Megasoft [3] | | Bosnia | |
| 229 | Megasoft [4] | missing | | |
| 230 | Megasoft [5] | | Russia | |
| 231 | Megasportz | Beyond Belief | United Kingdom | |
| 232 | MegaStars Hackers Group | | Russia | Kurgan |
| 233 | Megasystem Group | | Russia | Moscow |
| 234 | Mel Croucher | | United Kingdom | |
| 235 | Melbourne House | Melbourne House Publishers Ltd | | |
| 236 | Melbourne House | | Australia | |
| 237 | Melbourne House Publishers Ltd | | | |
| 238 | Melbourne House-88 | | | |
| 239 | Memoco Electron | | United Kingdom | |
| 240 | Memotronic | | Germany | |
| 241 | Memotronic | | Germany | |
| 242 | Mental Images | | United Kingdom | |
| 243 | Mental Images | | United Kingdom | |
| 244 | Mental Inspiration Unity | | Russia | Apatity |
| 245 | Mental Inspiration Unity | | Russia | |
| 246 | Mentor Software | | United Kingdom | |
| 247 | Meow Micros | | United Kingdom | |
| 248 | Mercurian Pulp Products | | United Kingdom | |
| 249 | Mercury Software | | United Kingdom | |
| 250 | Merimpex Ltd | | | |
| 251 | Merlin Software | | Russia | Tula |
| 252 | Merlin Software [1] | | United Kingdom | |
| 253 | Merlin Software [2] | | Russia | |
| 254 | Merry Life-Hackers Famely | | Russia | Miass |
| 255 | Mesoft | | United Kingdom | |
| 256 | Metal Militia Group | | Russia | Goryachy Klyuch |
| 257 | Metal Soft | | Argentina | |
| 258 | Metempsychosis | | | |
| 259 | Methodia Design Norway | | Norway | |
| 260 | MFM Data Services Ltd | | United Kingdom | |
| 261 | MG & Co | Mr.Gluk & Co | Russia | Ivanovo |
| 262 | MGN Group | | Russia | |
| 263 | MGS Software | | Czech Republic | |
| 264 | MGSoft | | Brazil | |
| 265 | mHm | | Russia | |
| 266 | MHS Muller Hard & Software | | Germany | |
| 267 | MHS Muller Hard & Software | | Germany | |
| 268 | MHT Ingenieros S.L. | | Spain | |
| 269 | MI & DI Ltd Software | | Russia | |
| 270 | MI & DI Ltd Software | | Russia | |
| 271 | MI&DI Ltd | | | |
| 272 | MI&DI Ltd. | | | |
| 273 | MI-Soft [1] | | United Kingdom | |
| 274 | Miami-Soft | | Slovakia | |
| 275 | MiC Software | | Poland | |
| 276 | Michael Batty | | United Kingdom | |
| 277 | Michael Bellamy | | United Kingdom | |
| 278 | Michael Orwin | | | |
| 279 | Michael Slatford | | United Kingdom | |
| 280 | Michael Slatford Software | missing | | |
| 281 | Michal Matejka | | | |
| 282 | Michal Polak | | Czech Republic | |
| 283 | Micro Accessories | | United Kingdom | |
| 284 | Micro Adventurer | Sunshine Books Ltd | United Kingdom | |
| 285 | Micro ART | | Russia | |
| 286 | Micro Computer Software | | | |
| 287 | Micro Connection | | Netherlands | |
| 288 | Micro Data | | Italy | |
| 289 | Micro Gold | missing | | |
| 290 | Micro House | | Uruguay | |
| 291 | Micro Investor Software | | United Kingdom | |
| 292 | Micro Kid | | United Kingdom | |
| 293 | Micro Limit | | Sweden | |
| 294 | Micro Master | missing | | |
| 295 | Micro Power Ltd | | United Kingdom | |
| 296 | Micro Press [1] | | United Kingdom | |
| 297 | Micro Sistemas | | Brazil | |
| 298 | Micro Style | missing | | |
| 299 | Micro Style | | | |
| 300 | Micro Style-90 | | | |
| 301 | Micro Value | Tynesoft | United Kingdom | |
| 302 | Micro Wares | Computer Wares | United Kingdom | |
| 303 | Micro World | | Spain | |
| 304 | Micro Zeighty | | United Kingdom | |
| 305 | Micro-Bit Software | | Spain | |
| 306 | Micro-De-Bug Consultancy | | United Kingdom | |
| 307 | Micro-Kraft | | United Kingdom | |
| 308 | Micro-Mart Software | | United Kingdom | |
| 309 | Micro-Partner | | Germany | |
| 310 | Micro-Source | | Netherlands | |
| 311 | Micro-Spot | | Spain | |
| 312 | Microamigo S.A. | | | |
| 313 | Microbyte [1] | Microbyte S.A. | | |
| 314 | Microbyte [2] | | United Kingdom | |
| 315 | Microbyte S.A. | | | |
| 316 | Microbyte Software [1] | | Spain | |
| 317 | Microbyte Software [2] | | Portugal | |
| 318 | Microcell Computer Systems | | | |
| 319 | Microdeal | | United Kingdom | |
| 320 | Microdigital | Microdigital Eletronica Ltda | Brazil | |
| 321 | Microdigital Eletronica Ltda | | Brazil | |
| 322 | Microdigital Soft S.A. | | Spain | |
| 323 | Microdot Software | | United Kingdom | |
| 324 | Microelectronics Education Programme | Tecmedia | United Kingdom | |
| 325 | Microfayre | | United Kingdom | |
| 326 | Microgame Simulations | | United Kingdom | |
| 327 | MicroHobby | Hobby Press S.A. | Spain | |
| 328 | MicroHobby Especial | Hobby Press S.A. | Spain | |
| 329 | Microholics Anonymous | | United Kingdom | |
| 330 | Microids | | France | |
| 331 | MiCROL | | United Kingdom | |
| 332 | Micromania | missing | | |
| 333 | Micromania [2] | Hobby Press S.A. | Spain | |
| 334 | Micromega | | United Kingdom | |
| 335 | Micronet 800 Telesoftware | | United Kingdom | |
| 336 | Microparadise Software | MicroWorld S.A. | | |
| 337 | Micropress [2] | | Netherlands | |
| 338 | Microprose | | | |
| 339 | MicroProse Software Ltd | | | |
| 340 | MicroProse Software Ltd | Atari Inc | United Kingdom | |
| 341 | Microscreen Software | | | |
| 342 | Microsphere | Microsphere Computer Services Ltd | | |
| 343 | Microsphere Computer Services Ltd | | | |
| 344 | Microtax Ltd | | United Kingdom | |
| 345 | Microtech | | | |
| 346 | Microtech Systems [1] | | United Kingdom | |
| 347 | Microtech Systems [1] | | United Kingdom | |
| 348 | Microtech Systems [2] | | Slovakia | |
| 349 | Microtrust Software | | United Kingdom | |
| 350 | Microware | missing | | |
| 351 | Microworkshops Ltd | | United Kingdom | |
| 352 | MicroWorld S.A. | | | |
| 353 | Midi Group | | | |
| 354 | Midisoft [1] | | United Kingdom | |
| 355 | Midisoft [2] | | Russia | |
| 356 | Midnight Group | | Russia | Novorossiysk |
| 357 | Miguel Angel Montejo Raez | | Spain | |
| 358 | Mihip | | | |
| 359 | Mike Hampson | | United Kingdom | |
| 360 | Mike Marchant Graphics | | United Kingdom | |
| 361 | Mike White | | United Kingdom | |
| 362 | MIKRO | | Denmark | |
| 363 | Mikro+Kleincomputer Informa Verlag AG | | Germany | |
| 364 | Mikro-Gen Ltd | | United Kingdom | |
| 365 | Mild Group | | Russia | Yoshkar-Ola |
| 366 | Mild Soft | | Russia | |
| 367 | Mild Software | | Belarus | Minsk |
| 368 | Miles Gordon Technology | | United Kingdom | |
| 369 | Millansoft | | Spain | |
| 370 | Millenium Software | | United Kingdom | |
| 371 | Millside Software | | United Kingdom | |
| 372 | Millsoft | | United Kingdom | |
| 373 | MilousSoft | | Czech Republic | |
| 374 | Milytia | | Russia | Izhevsk |
| 375 | Minatron Computing | | United Kingdom | |
| 376 | Mind | | | |
| 377 | Mind Games | missing | | |
| 378 | Mind Games | | | |
| 379 | Mind Games Espana | | | |
| 380 | Mind Games Espana S.A. | | Spain | |
| 381 | Mind's Eye | | | |
| 382 | Mind's Eye Software | | United Kingdom | |
| 383 | Mind's Eye Software | | United Kingdom | |
| 384 | Mind's Eye Software | | | |
| 385 | Mindgames | | | |
| 386 | Minds Eye | | | |
| 387 | Mindscape | | | |
| 388 | Mindscape International Inc | | United Kingdom | |
| 389 | Mine of Information Ltd | | | |
| 390 | Minicom Soft | | United Kingdom | |
| 391 | Minimal Systems | | United Kingdom | |
| 392 | minimalartifact | | | |
| 393 | Minimicro Software | | United Kingdom | |
| 394 | Minisoft | | Belarus | |
| 395 | MIPh and T Hacker Club | | Russia | Moscow |
| 396 | MIPh&T Hacker Club | | Russia | Moscow |
| 397 | MiPH&T Hackers Club | | Russia | |
| 398 | MiPH&T Hackers Club | | Russia | |
| 399 | MiPH&T Hackers Club | | Russia | |
| 400 | Mira Software | | United Kingdom | |
| 401 | Miracle Games | missing | | |
| 402 | Miracle Technology UK Ltd | | United Kingdom | |
| 403 | Mirage Software | | United Kingdom | |
| 404 | Miratec Systems | | United Kingdom | |
| 405 | Mirko Monninghoff | | Germany | |
| 406 | Miroslav Fidler | | Czech Republic | |
| 407 | Mirror | | | |
| 408 | Mirrorsoft Ltd | | United Kingdom | |
| 409 | Mirrorsoft Ltd-86 | | | |
| 410 | Misha Pertsovsky | | | |
| 411 | Misoft [2] | | United Kingdom | |
| 412 | Mission Software | | United Kingdom | |
| 413 | MISTER BEEP | | Poland | |
| 414 | Mister Chip | Software Micro Chip S.L. | | |
| 415 | Mistika Ltd | | | |
| 416 | Mistral Software | | United Kingdom | |
| 417 | Mitchell | Mitchell Corporation | | |
| 418 | Mitchell Corporation | | | |
| 419 | Mitchell Software Ltd | Robin Clive Mitchell | United Kingdom | |
| 420 | Miva Rafii | | Poland | |
| 421 | Mix Soft | | Russia | |
| 422 | Mixt | | | |
| 423 | Mixt Dimension | | Spain | |
| 424 | Mizar | | | |
| 425 | Mizar Computing | | United Kingdom | |
| 426 | Mizar Computing | | United Kingdom | |
| 427 | MKSoft Ltd | missing | | |
| 428 | ML Group | | Russia | Novocheboksarsk |
| 429 | mma | | | |
| 430 | MMCG | | | |
| 431 | Mme Sosostris | | United Kingdom | |
| 432 | Mme Sosostris Astro Computing | | United Kingdom | |
| 433 | Mme Sosostris Astro Computing | | United Kingdom | |
| 434 | MMM Group | | | |
| 435 | MNEMOtech | | | |
| 436 | MNL Software | | United Kingdom | |
| 437 | Moderation | | Russia | Neftekamsk |
| 438 | Modular Resources Ltd | | United Kingdom | |
| 439 | Mogul Communications Ltd | | United Kingdom | |
| 440 | MoI | Mine of Information Ltd | | |
| 441 | Moj Mikro | | Slovenia | |
| 442 | Mojon Twins | | | |
| 443 | Mojon Twins;Jarlaxe | | | |
| 444 | Mole Software | | United Kingdom | |
| 445 | Moment Records | | Russia | |
| 446 | Monaco Computing Corporation | | | |
| 447 | Monea Software | missing | | |
| 448 | Monflair Ltd | | United Kingdom | |
| 449 | Monk Soft | missing | | |
| 450 | Mono Soft | missing | | |
| 451 | Monolith | missing | | |
| 452 | Monser S.A. | | Spain | |
| 453 | Monster's Legs Productions | Kevin McGrorty | United Kingdom | |
| 454 | Monster's Legs Productions | missing | | |
| 455 | Monsterbytes | missing | | |
| 456 | Monsters Productions | | | |
| 457 | Montevideo Uruguay | | Uruguay | |
| 458 | Monument Microgames | | | |
| 459 | Moonchild Software | missing | | |
| 460 | Moonsoft | | Russia | Korkino |
| 461 | Moonstone | | United Kingdom | |
| 462 | Moonstone Computing | | United Kingdom | |
| 463 | Morbosoft | | Spain | |
| 464 | Morex Peripherals Ltd | Abbeydale Designers Ltd | United Kingdom | |
| 465 | Morley Davies Associates | | United Kingdom | |
| 466 | Morpheus Games | | United Kingdom | |
| 467 | Morrisons | Wm Morrison Supermarkets PLC | | |
| 468 | Morsoft | | United Kingdom | |
| 469 | Mortal Kombat Hackers Group | | Russia | Moscow |
| 470 | Mosaic Publishing Ltd | | United Kingdom | |
| 471 | Motivation Software | Alec Carswell | United Kingdom | |
| 472 | Moy Gorod | | | |
| 473 | MPF Software | | Russia | |
| 474 | MPS Group | | Russia | Moscow |
| 475 | MQM Team | | Czech Republic | Brno |
| 476 | MQM Team | | Czech Republic | |
| 477 | Mr Byte Software | | Italy | |
| 478 | Mr Gluk & Company | Mr.Gluk & Co | Russia | Ivanovo |
| 479 | Mr Incognito | | | |
| 480 | Mr. Chip Software | Magnetic Fields | United Kingdom | |
| 481 | Mr. Johny Renegade | | | |
| 482 | Mr. Ltd | | Russia | |
| 483 | Mr. Micro | | | |
| 484 | Mr. Micro Ltd | | | |
| 485 | Mr. Micro Ltd | Handmade Software Ltd | | |
| 486 | Mr. Mikro | | | |
| 487 | Mr. Scrololo | | | |
| 488 | Mr.Gluk & Co | | Russia | Ivanovo |
| 489 | MRP-SBS Software | | United Kingdom | |
| 490 | MRSoft | | Czech Republic | |
| 491 | MS Software | | Germany | |
| 492 | MS-CID | | Czech Republic | |
| 493 | MSA Crew | | Ukraine | Odessa |
| 494 | MSD | | Russia | Ufa |
| 495 | MSD Group | | Russia | |
| 496 | MSD Group | | Russia | |
| 497 | Msoft | | United Kingdom | |
| 498 | MSoftware | | | |
| 499 | MST Consultants | | United Kingdom | |
| 500 | MST Consultants | | United Kingdom | |
| 501 | Mugen Group | | Russia | Petrozavodsk |
| 502 | Multi-Soft Games | | United Kingdom | |
| 503 | Multi-Soft Games | | United Kingdom | |
| 504 | Multisoft | | Germany | |
| 505 | Multisoft Informatica Ltda | | Brazil | |
| 506 | Multyplex | | | |
| 507 | Multyplex Group | | Russia | |
| 508 | Multyplex Group | | Russia | |
| 509 | Munning Games | | United Kingdom | |
| 510 | Munning Games | | United Kingdom | |
| 511 | Mushroomsoft | | United Kingdom | |
| 512 | Music Soft | | Spain | |
| 513 | Musical 1 S.A. | | Spain | |
| 514 | Musical Muntaner S.A. | | | |
| 515 | Musicsoft | | Russia | Moscow |
| 516 | MW Gamesworld | | United Kingdom | |
| 517 | MW Gamesworld | | United Kingdom | |
| 518 | MW Software | | United Kingdom | |
| 519 | Mxxoft | | Poland | |
| 520 | My Cat Software | | | |
| 521 | Myrmidon Software | | United Kingdom | |
| 522 | Mystery Software | | United Kingdom | |
| 523 | Mystic Code Group | | | |
| 524 | Mystic Software | | United Kingdom | |
| 525 | Myth Corp | | | |
| 526 | Mythos Games Ltd | | United Kingdom | |
| 527 | Mythsoft | | United Kingdom | |
| 528 | Маршрут на Юпитер | | Ukraine | Sinelnikovo |
