The article implies that Final Fantasy was inspired to use "MP" from Ultima III, which used it as an abbreviation of "magic points". The article then goes on t

The article implies that Final Fantasy was inspired to use "MP" from Ultima III, which used it as an abbreviation of "magic points". The article then goes on to say that the first game to explicitly use "MP" to mean "mana points" was Dungeon Master, which came out the same year as Final Fantasy, but was not a JRPG.