Mega - Refers to million or millions. MegaHertz - Refers to a million Hertz . Is data belonging to a class. Mhz - See MegaHertz . MIB - Is a Management Information Base.
Mice is synonymous with mouses.
MIDI - refers to the Musical Instrument Digital Interface. MMO - Is the Mission Management Office. MOC - Is the Mission Operations Center. Modems are used to translate digital signals to analog and visa-versa. Typically these devices are used to transfer data between computers across analog phone lines.