PDA

(Personal Digital Assistant) A handheld computer that serves as an organizer for personal information. It generally includes at least a name and address database, to-do list and note taker. PDAs may be combined with cellphones and other wireless technologies, providing a mobile office for people on the go.

PDAs are pen based and use a stylus to tap selections on menus and to enter printed characters. The unit may also include a small on-screen keyboard which is tapped with the pen. Data are synchronized between the PDA and desktop computer via cable or wireless transmission.

A PDA is like a palmtop computer except that the PDA typically uses a pen whereas the palmtop uses a small keyboard. Apple's MessagePad, more commonly known as the "Newton," was the pioneer in this field in 1993. However, PalmPilots, introduced a couple years after, popularized the technology. See Newton and Palm.