A point may be used after a word has been shortened: "Pty. Ltd." The words doctor, mister, and mistress are often made shorter when used with a name. ""Dr." Smith" is the name of a doctor whose last name is Smith, and ""Mr."" Banerjee is short for Mister Banerjee. ""Mrs"" means a wife, ""Miss"" is an unmarried female. ""Ms"" can be used for either. A point is also used after a first or middle initial, but does not follow the last name, for example, ""J." Citizen".