ME (_plural_ MES)
* (initialism) Master of engineering
* (initialism) Medical examiner.
* 1939, Raymond Chandler, _The Big Sleep_, Penguin 2011, p. 52:
The little M.E.’s man nodded, picked his bag off the deck and went back up the steps to the pier.
* Montreal Exchange, a futures and derivatives exchange (formerly also a stock exchange)