As of 2010, thousands of applications existed for handhelds adhering to the Microsoft Pocket PC specification, many of which were freeware. Microsoft-compliant Pocket PCs can be used with many add-ons such as GPS receivers, barcode readers, RFID readers, and cameras.
In 2007, with the advent of Windows Mobile 6, Microsoft dropped the name Pocket PC in favor of a new naming scheme: The Pocket PC was an evolution from prior calculator-sized computers.
Pocket PC 2002 was launched October 2001, and was powered by Windows CE 3.0, as with its predecessor.
In 1982, Hewlett Packard's HP-75 incorporated a 1-line text display, an alphanumeric keyboard, HP BASIC language and some basic PDA abilities.Before the Pocket PC brand was launched, there were other Windows-based machines of the same form factor made by HP, Philips, and others called Palm-size PCs.These devices ran Windows CE 2.0–2.11 and had an interface that was similar to the then-current desktop versions of Windows, such as Windows 98.The HP 95LX, HP 100LX and HP 200LX series packed a PC-compatible MS-DOS computer with graphics display and QWERTY keyboard into a palmtop format.The HP Omni Go 100 and 120 used a pen and graphics interface on DOS-based PC/GEOS, but was not widely sold in the United States.