Category:Universal Century mobile weapons
In the Universal Century timeline, Mobile ARMOUR (MA in short) is an acronym for All Range Maneuverability Offence Utility Reinforcement. While this definition has since been officially endorsed by Sunrise, it originated from a semi-official guide book called Gundam Century. In addition, the acronym does not seem to be a particularly accurate description of mobile armours, as they rarely display "all range" capabilities (instead tending to be specialized to very specific environments) and are almost always employed as independently-operating juggernauts, rather than as "reinforcement" for mobile suits.
For a full explanation, please refer to the article Mobile Armour.