The original handheld that accepted handwriting was Apple's Newton, which was later withdrawn from the market. Today, the most popular handheld that accepts handwritten input is the PalmPilot from 3Com. Philips, Casio, NEC, Compaq, and other companies make handhelds with small keyboards. Windows CE and EPOC are two of the most widely used operating system s in handheld computers.
Keyboards have tiny keys that take getting used to.
Those that handle handwriting also impose constraints and require some learning. Nevertheless, this class of computer is widely sold and appreciated by many users. Hewlett-Packard has recently introduced the first handheld computer with a color display. A number of companies now combine voice and data telephone service using cellular telephone or other wireless technologies with the handheld computer in a single device. Click on the Handhelds category.