All PDAs use a touch-sensitive screen features in its operation. This is because many features of a PDA that required him to have a big screen. When coupled with the keyboard it will make a bigger shape and no longer efficient. Therefore, touch-screen technology diguanakan as shortcut keys. The touch screen is operated using a stylus (a special pen). There are four ways to enter text:
1. Using a virtual keyboard that automatically appears on the screen sentuhya.
2. Using an external keyboard connected via USB or Bluetooth.
3. Using letter or word recognition ability. You do this by writing letters or words on the touch screen, which then will be corrected automatically by the system is contained on your PDA
Source :http://id.wikipedia.org/wiki/PDA#Layar_Sentuh
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