Ms (UK) or Ms. (USA), (pronounce /mɪz/ or /məz/) is an English honorific used with the last name or full name of a woman. As with Mrs. and Miss, Ms. is a contraction of the honorific "Mistress", which is the feminine of "Mister" or "Master". However, unlike Miss and Mrs., it does not presume the addressee's marital status. Ms. originated in the United States and was popularized in the 1970s. In the U.S., the Emily Post Institute states that Ms. is the default form of address for business correspondence with a woman.