Microsoft PocketPC In 2001, PDAs with Palm OS installed enjoyed a market share of about 72 percent, while PocketPC held a meager 15 percent. However, by the fourth quarter of 2004, Microsoft PocketPC and Palm OS were practically tied. With sales of Palm OS devices down, PocketPC-based devices had a market share of 40.2 percent to Palm's 40.7 percent. This is evidence of the growing popularity of PocketPC-based devices, and thus the increased likeliness one will encounter such a device "in the field."
The PocketPC operating system began as Windows CE in November of 1996. The NEC MobilePro 200 and the Casio A-10 were the first two PDA-type device available with this early version of the operating system. From here, Windows CE continued in development through versions 2 (with such devices as the MD Elan SC400, DEC SA1100, Hitachi SuperH 3, NEC VR4101, Philips DR 31500, and the Toshiba TX3912).