| minimal alveolar concentration (MAC) | konsentrasi minimum alveolar | kepekatan minimum arveolar | kepekatan minimum alveolar | Perubatan |
| medium access control (MAC) | kontrol akses medium | kawalan capaian medium | kawalan capaian media | Teknologi Maklumat |
| mean aerodynamic chord (mac) | garis rentas aerodinamik purata | garis rentas aerodinamik purata | garis rentas aerodinamik purata | Kejuruteraan Kapal Terbang |