|Noun||1.||personal digital assistant - 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.|
|(computer)||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.