Punctuation
For example: The words doctor or mister 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" and "Mrs. Yang" are common ways of writing. However, in modern typography, plain "Mr, Mrs/Ms" or "Dr" are more common. "Mrs" is never written in full: to write  "mistress" is to mean something quite different. See also capitalization.