Personal Digital Assitant (PDA) is a generic term for a digital organiser.Originally Posted by West_ray
The two leading OSes in the PDA market now are the Windows Mobile 2003 and Palm OS 5.0. Different PDA manufacturers use different OSes e.g. HP, Dell uses WM2003, Sony uses Palm OS and so on.
By the way, I guess I should have warned you first but well, the comparison between PocketPCs and Palms have been debated to death across various PDA forums so I would suggest you do a search in those forums regarding this topic.