资料来源 : WordNet®

personal digital assistant
     n : a lightweight consumer electronic device that looks like a
         hand-held computer but instead performs specific tasks;
         can serve as a diary or a personal database or a
         telephone or an alarm clock etc. [syn: {PDA}, {personal
         organizer}, {personal organiser}, {organizer}, {organiser}]

资料来源 : Free On-Line Dictionary of Computing

Personal Digital Assistant
     
         (PDA) A small hand-held computer typically
        providing calendar, contacts, and note-taking applications but
        may include other applications, for example a {web browser}
        and {media player}.  Small keyboards and pen-based input
        systems are most commonly used for user input.
     
        The {Apple Newton} was a fairly early example.
     
        [First?  Notable examples?  Current Best?]
     
        (2002-09-03)