The Pocket PC is an evolution from previous calculator-sized computers. Keystroke-programmable calculators which could do simple business and scientific applications were available by the 1970s.
In 1982, Hewlett Packard's HP-75 incorporated a 1-line text display, an alphanumeric keyboard, BASIC language and some basic PDA capabilities. The HP 200Lx series packed a PC-compatible DOS computer with graphics display and QWERTY keyboard into a palmtop format.
The Omnigo 100 used a pen and graphics interface on DOS, but was not widely accepted. The HP 300LX built a palmtop computer on the Windows CE operating system, but not until the form factor and features of the Palm platform were adapted did it become known as the "Pocket PC".
