| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Company | Phone Number | Comments |
| McAfee Associates | (408) 988-3832 | Virus scanner |
| M/H Group Inc | (312) 443-1222 | |
| Magitronic Technology | (516) 454-8220 | Magitronic 286, 386 mail order comp |
| Magna Software | (800) Support | |
| Magnetic Peripherals | (612) 853-8100 | Makes hard disks, division of Control Data |
| MainLAN | (800) 999-6770 | Technical Support |
| Manhattan Graphics | (914) 769-2800 | ReadySetGo desktop- publishing system |
| Mannesmann Tally | (206) 251-5500 | Tally printers |
| Mass Micro | (800) 442-7979 | Technical support |
| Mass Micro | (800) 522-7979 | end user service |
| Mastersoft Inc | (800) 624-6107 | |
| Matrix | (800) 365-0191 | |
| Matrix | (914) 365-0190 | Main number |
| Matrox Graphics | (800) 361-1408 | |
| Maxtor | (303) 678-2700 | Hard drive manufacturer |
| Maxtor | (800) 356-5333 | |
| Maxtor | (800) 262-9867 | Tech Support |
| Maxtor | 303-678-2618 | Faxback |
| Maynard Electronics | (305) 331-6402 | |
| MCAE (Modern Computer Aided Engineering) | (317) 497-1550 | Inertia Engineering System |
| Media Vision | (510) 770-9905 | Technical support |
| Media Vision | (800) 638-2807 | Technical support |
| Media Vision | (800) 845-5870 | Sales information |
| Media Cybernetics | (301) 495-3305 | Halo DPE page composition package |
| Meridian Data | (408) 476-5858 | for Hitachi CDR-1502S, CDR-2500S, Philips CM-100, Sony CDU-100 |
| Meta Software Corp | (617) 576-6920 | Design/20 diagram manager |
| Metheus Corp | (503) 640-8000 | Metheus UGA 1008 graphics board |
| Metz Software | (206) 869-6292 | |
| Micom-Interlan Inc | (617) 263-9929 | |
| Microsoft | (800) 426-9400 | Switchboard U.S. Listings |
| Microsoft | (206) 936-8661 | Switchboard International |
| MicroSolutions | (815) 756-3411 | Compaticard |
| Micro Decisionware | (303) 443-2706 | PC/SQL-Link SQL database interface |
| Micro Display Systems | (612) 437-2233 | Genius VHR Monitor |
| Micro Express | (714) 852-1400 | |
| Micro Peripherals | (619) 487-7112 | Print Mate 350 printer |
| Micro Smart Inc | (617) 872-9090 | Smart Micro 286, 386 mail order comp |
| Micro Tempus | (514) 397-9512 | Tempus-Access mainframe interface application |
| Micro-Computer Education | (213) 316-0136 | PEGASUS relational database system |
| Micro-Design Intl | (305) 677-8333 | |
| Microcom | (617) 551-1414 | Carbon Copy for Windows |
| Microcom | (919) 551-1277 | Support for Virix program |
| Microfield Graphics Inc | (617) 576-6920 | T8 Color Graphics Controller device driver/board |
| MicroFirmWare | (405) 321-8333 | Technical support for Phoenix Bios |
| Micrografx Inc | (214) 234-1769 | Windows ClipArt clip art library |
| Micrografx Inc | (214) 234-1769 | Windows Graph Business graphics & charting |
| Micrografx Inc | (214) 234-1769 | Designer technical drawing program |
| Micrografx Inc | (214) 234-1769 | In*A*Vision intermediate CAD package |
| Micrografx Inc | (214) 234-1769 | Windows CONVERT graphics conversion utility |
| Micrografx Inc | (214) 234-1769 | Windows Draw 2-D drawing system |
| Micrografx Inc | (214) 234-2694 | Technical support |
| MicroLogic | (510) 652-5464 | MoreFonts |
| Microlytics, Inc | (716) 248-9620 | Works WordFinder |
| Micromint | (800) 635-3355 | Ciarcia's Circuit Cellar design distributor |
| Micron Technology Inc | (208) 368-4000 | |
| Micronics Comp | (510) 651-2300 | Micronics 386 motherboard |
| Micropolis Corp | (818) 709-3300 | Micropolis hard disk drives |
| Microscience Intl | (408) 433-9898 | Microscience hard disk drives |
| Microspeed Inc | (415) 490-1403 | Fast88 accelerator board |
| Microsoft Corp. | (800) 426-9400 | end user Technical Support |
| Microsoft Corp. | Microsoft End-User Referral Numbers | |
| Microsystems Inc Forth Compiler | (213) 306-7412 | |
| (800) 654-4160 | ScanMate for MS-300A image scanners | |
| Microtek Faxback | (310) 297-5101 | |
| MicroTRENDS Tools | (312) 310-8928 | WORM custom development |
| Micro Vitech Inc | (404) 991-2246 | |
| MicroWay Inc | (508) 746-7341 | MicroWay 80386 math coprocessor systems |
| MicroWorkshop Inc | (516) 737-5600 | MicroWorkshop development environment |
| Mindscape | 1-800-409-1497 | technical support |
| Mindscape | (312) 480-7667 | Balance of Power geopolitics simulation game |
| Mindspring | (800) 557-9614 (425) 957-8995 |
|
| Miniscribe | (303) 651-6000 | |
| Mitsubishi Electronics | (714) 220-2500 | |
| Mitsubishi Electronics | (800) 344-6352 | Technical support |
| Monitor Technology | (612) 551-1478 | Viking 1 high-resolution display system |
| Monitronix Corp | (614) 891-3232 | |
| Monolithic Systems Corp | (800) 525-7661 | JustRam memory board |
| Monolithic Systems Corp | (303) 790-7400 | |
| Moon Valley Software | (602) 375-9502 | Technical support |
| Motorola | (800) 441-2447 | 68000 series microprocessors |
| Mountain Computer Inc | (800) 458-0300 | |
| Mountain Network Solutions | (408) 438-7897 | |
| MP&G Research Inc | (312) 297-4609 | System Encyclopedia software engineering system |
| MSC Technologies | (510) 656-1117 | MSC Technologies PC Mouse |
| Mustek | (949) 788-3600 | Technical Support |
| Mylex Corp | (800) 776-9539 |
