A "PocketPC" is commonly referred to as a small-scale (hand-held) computer that runs Microsoft’s PocketPC/Windows Mobile software. As an operating system, Microsoft PocketPC, sometimes referred to as P/PC or PPC, is based upon the Windows CE framework. There are a few variants of this OS, namely "PocketPC 2000," "PocketPC 2002," "Windows Mobile 2003 (and Windows Mobile 2003 SE)," and the latest, "Windows Mobile 5.0.” Additional variants exist for SmartPhones, such as Windows Mobile 2003 Smartphone edition. The PDA version of the operating system can often be found in such devices as the Compaq iPaq, HP Jornada, and Dell Axim.
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).
As previously noted, there exist many variants of the PocketPC operating system. Below are a summary of each.
Windows Mobile 2003/SE
Windows Mobile 5.0
Pocket PC Devices