Read the full sentence: > "Ms." began to be used as early as the 17th century, along with "Miss" and "Mrs.", as a title derived from the then formal "Mistress"

Read the full sentence: > "Ms." began to be used as early as the 17th century, along with "Miss" and "Mrs.", as a title derived from the then formal "Mistress", which, like Mister, did not originally indicate marital status. "Ms.", however, fell into disuse in favor of the other two titles and was not revived until the 20th century. It wasn't until the 1960s that "Ms." appeared as a formal category in the United States on forms.