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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Telephony Application Programming Interface
   TAPI
      <programming, communications> (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)