| 
 | 
 
 | 
| M | 
ALi, ATT, Fuji, Hitachi, Intel, Maxim, Micron, Mitel, Mitsubishi, Motorola, Oki, Philips, SGS, Toshiba | 
| M5M | 
Mitsubishi | 
| MA | 
Analog Systems, Intermetall, Marconi, Matsushita, Panasonic | 
| MAC* | 
Motorola | 
| MACH | 
AMD, Motorola | 
| MAS | 
HP, Maxim | 
| MAT | 
AD, PMI | 
| MAW | 
Motorola | 
| MAX | 
Maxim, Motorola, TI | 
| MB | 
Fuji, Fujitsu, GI, Mitel (=Board/Ancilliary), Motorola, Philips | 
| MBAV | 
Motorola | 
| MBAW | 
Motorola | 
| MBB | 
Motorola | 
| MBD | 
Motorola | 
| MBL | 
Fuji | 
| MBM | 
AMD, Fuji | 
| MBR | 
GI, IR, Motorola, NS, Philips | 
| MBRB | 
Motorola | 
| MBRD | 
Motorola | 
| MBRL | 
Motorola | 
| MBRS | 
Motorola | 
| MBS | 
Fuji, Motorola | 
| MBT | 
Motorola | 
| MBTA | 
Samsung | 
| MBX | 
Motorola | 
| MBYR | 
Philips | 
| MC | 
Maxim, Microchip, Micron, Mitsubishi, Motorola, NEC, NS, Philips, SGS, Signetics, TI, Toshiba | 
| MCA | 
Motorola | 
| MCB | 
Motorola | 
| MCC | 
Motorola | 
| MCCF | 
Motorola | 
| MCCS | 
Motorola | 
| MCD | 
Motorola | 
| MCE | 
Motorola | 
| MCER | 
Motorola | 
| MCM | 
Motorola | 
| MCMM | 
Motorola | 
| MCO | 
Motorola | 
| MCR | 
Motorola | 
| MCS | 
MOS* Technology, Motorola | 
| MCSP | 
MCS Logic | 
| MCT | 
Motorola, NS, QT | 
| MCUR | 
Motorola | 
| MD | 
AMD, Cirrus, Intel, Mitel | 
| MDP | 
DALE | 
| MDV | 
SGS | 
| MEC | 
Motorola | 
| MF | 
NS, Toshiba | 
| MFE | 
Motorola | 
| MG | 
Toshiba | 
| MH | 
Mitel, Mitel (=Hybrid) | 
| MHW | 
Motorola | 
| MIC | 
ITT, ML, MICRE, Microchip | 
| MIL | 
Microsystems International | 
| MJ | 
Motorola, SGS | 
| MJD | 
Motorola, Samsung | 
| MJE | 
Motorola, SGS, SMC | 
| MJF | 
Motorola | 
| MJH | 
Motorola | 
| MJL | 
Motorola | 
| MJR | 
Motorola | 
| MJW | 
Motorola | 
| MK | 
Mitel, ST/Mostek, SGS | 
| MKP | 
Motorola, Philips | 
| ML | 
IR, ML, Mitel, Oki, Plessey, SGS | 
| MLC | 
MCS Logic | 
| MLED | 
Motorola | 
| MLL | 
ITT, MICSE, Motorola | 
| MM | 
AMD, Harris, Mitsubishi, MMI, Motorola, My-MS, NS, Teledyne | 
| MMAD | 
Motorola | 
| MMBC | 
Motorola | 
| MMBD | 
Motorola, NS, Philips | 
| MMBF | 
Motorola | 
| MMBR | 
Motorola | 
| MMBRH | 
Motorola | 
| MMBT | 
Motorola, NS, Philips | 
| MMBT1 | 
Motorola | 
| MMBTA | 
Motorola, NS | 
| MMBTH | 
Motorola | 
| MMBV | 
Motorola | 
| MMBZ | 
Motorola, NS, Philips | 
| MMC | 
Motorola | 
| MMD | 
Motorola | 
| MMDF | 
Motorola | 
| MMDT | 
Motorola | 
| MMET | 
Motorola | 
| MMFT | 
Motorola | 
| MMMC | 
Motorola | 
| MMPQ | 
Motorola | 
| MMPT | 
Motorola | 
| MMR | 
Motorola | 
| MMRV | 
Motorola | 
| MMSD | 
Motorola | 
| MMSF | 
Motorola | 
| MMSTA | 
Rohm | 
| MMSZ | 
Motorola | 
| MN | 
Matsushita, MN, NS, Panasonic, Plessey | 
| MNR | 
Rohm | 
| MOC | 
Motorola, Philips, QT | 
| MOLM | 
Motorola | 
| MOT | 
Motorola | 
| MP | 
MicroPowerSystems, Microchip, NS, TI, Toshiba | 
| MPC | 
BB, Motorola | 
| MPC | 
Motorola | 
| MPD | 
NEC | 
| MPF | 
Motorola | 
| MPQ | 
Allegro, Motorola | 
| MPS | 
Motorola, NS, Philips | 
| MPSA | 
Motorola, NS, Philips, Samsung, Toshiba | 
| MPSH | 
Motorola, Philips | 
| MPSU | 
Motorola | 
| MPSW | 
Motorola | 
| MPX | 
Motorola | 
| MPY | 
TRW | 
| MR | 
GI, Motorola | 
| MRA | 
Motorola | 
| MRD | 
Motorola | 
| MRF | 
Motorola | 
| MRFIC | 
Motorola | 
| MRW | 
Hitachi | 
| MRZ | 
Motorola | 
| MS | 
Mitel, MV | 
| MSA | 
HP | 
| MSC | 
Oki | 
| MSL | 
Mitsubishi | 
| MSM | 
Mitsubishi, Motorola, Oki | 
| MSZ | 
NYT | 
| MT | 
Intel, Micron, Mitel, Mitel (=Telecom), Mitsubishi, Mosel | 
| MTA | 
Microchip | 
| MTB | 
Motorola | 
| MTD | 
Harris, Motorola, SGS | 
| MTP | 
Motorola, SGS | 
| MTPSN | 
SGS | 
| MTS | 
Motorola, Siemens | 
| MUE | 
Motorola | 
| MUR | 
Harris, Motorola, SGS | 
| MURD | 
Motorola | 
| MURP | 
Motorola | 
| MURS | 
Motorola | 
| MUX* | 
AD, PMI | 
| MV | 
Datel, Motorola, QT | 
| MVAM | 
Motorola | 
| MVD | 
Datel | 
| MVR | 
Rohm | 
| MWM | 
Motorola | 
| MX | 
Datel, MACRX, Motorola, Maxim, SGS | 
| MXD | 
Datel, Maxim | 
| MXL | 
Maxim | 
| MXM | 
Maxim | 
| MY | 
Hyundai | 
| MYR | 
Motorola | 
| MZ | 
Motorola | 
| MZTC | 
SGS | 
| MZX | 
Maxim |