PDA
full spelling ： Personal Digital Assistants
PDA is an information terminal for individual mobile phones. It is a very compact device, in which some functions of personal computers are implemented. It is loaded with a LCD device and connecting terminals with outside, and operated with electrical battery or special battery. The famous PDAs are Zaurus from Sharp, Newton from Apple, Cassiopeia from Casio, Palm from Palm Computing, and Visor from Handspring.