Mrs \Mrs.\ The customary abbreviation of Mistress or Missess when used as a title of courtesy, in writing and printing; as, Mrs. Clinton is commonly called by her full name, Hillary Rodham Clinton. [1913 Webster]
MRS 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)