Handhelds use a variety of technologies to allow you to input data into your device. 12-key Key Pad – Like the buttons found on your touchtone phone or cellular phone, key pad buttons bear numbers and other symbols, as well as letters, which can be used to input data. Touch Screen – Using the same screen to display and input information, use your stylus to navigate web pages and select files, and use an on-screen keyboard to type. QWERTY keypad – Like your PC keyboard, the QWERTY keypad features one button per letter for simplified data input.