1580s, abbreviation of mistress (q.v.), originally in all uses of that word. The plural Mmes. is an abbreviation of French mesdames, plural of madame, used in English to serve as the plural of Mrs., which is lacking. Pronunciation "missis" was considered vulgar at least into 18c. (cf missus). The Mrs. "one's wife" is from 1920.
One's wife; the LITTLE WOMAN: He wanted the missus to get some sleep (1833+)
Modifiable Representation System.
An integration of logic programming into Lisp.
["A Modifiable Representation System", M. Genesereth et al, HPP 80-22, CS Dept Stanford U 1980].
(1994-11-08)