| MIIDA |
| MILNOR |
| MINDRAY |
| MINERVA |
| MINOKA |
| MINOLTA |
| MIPRO |
| MIRAGE |
| MITA |
| MITAC |
| MITSUBISHI |
| MITSUI |
| MMD EQUIPMENT |
| MOFFAT |
| MONROE SYSTEMS FOR BUSINESS |
| MONTARBO |
| MONTGOMERY WARD |
| MOOG |
| MORPHYRICHARD |
| MORSE ELECTROPHONIC |
| MOTOROLA |
| MSI |
| MULITVOX |
| MULTIFLEX |
| MUNTZ |
| MURATEC |
| MURPHY |
| MUSICMAN |
| MUTOH |
| MYSTERY |
