(Personal Digital Assistant)
A PDA is a handheld device with organizer and basic computing functions. Most PDAs have a large touch-screen. Many also have a stylus and support handwriting recognition.
A typical PDA also has faster processor and more memory than a typical phone, and can run more complex software. Most PDAs run a standardized operating system (OS), such as PalmOS or Windows Mobile for Pocket PC.
In the spectrum of mobile devices, PDAs fall in-between a laptop computer and a cell phone.