Source : Free On-Line Dictionary of Computing

Automatically Programmed Tools
     
         (APT) A language for numerically controlled machine
        tools.
     
        Versions: APT II (IBM 704, 1958), APT III (IBM 7090, 1961).
     
        ["APT Part Programming", McGraw-Hill].
     
        [Sammet 1969, p. 605].
     
        (1995-05-04)