Source : Free On-Line Dictionary of Computing

Telephony Application Programming Interface
     
         (TAPI, or "Telephone Application
        Program Interface") A {Windows 95} {Application Program
        Interface} enabling hardware independent access to telephone
        based communication.  TAPI covers a rather wide area of
        services from initialising the equipment (e.g. a {modem}) and
        placing a call to {voice mail} or control of a remote
        computer.
     
        [Telephone or Telephony?]
     
        (1995-12-05)