These are handheld devices that come with their own built-in mini keypad for data entry. They can also store addresses and phone numbers and other types of information just like a palmtop. Personal organizers are usually less expensive than palmtops and are made by Psion, Rolodex, Casio, Sharp, Seiko, Royal, and Xircom, among other manufacturers. It includes scaled down pocket versions of Excel, Word, Internet Explorer and Schedule. E-Mail is supported in a smaller version of the InBox that is available in Windows 95.
Most Palmtop units operate using the Palm operating system.
Unlike Windows CE, the Palm operating system was designed specifically for the handheld units. Many personal organizers today use the Palm operating system. Since palmtops are usually used while on the go, entering information has to be quick and easy. Most palmtops come with an input device called a stylus, which is a small, thin, pen-like plastic device used on your palmtop s LCD screen. The stylus is used to perform various functions on a touch screen, as well as work as a pen when jotting down handnotes right onto your palmtop s screen.