Because a touch-screen is designed to be interactive. Trying not to get too technical... A touch screen is made up of two electrically charged layers. When you touch the screen, it changes the resistance just at that point. The device translates that change into an action.
Only the DSi's bottom screen is a touch screen.
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Most definitely. There are different technologies with capacitance and resistance being two methods of determining where the screen is being touched.
No. Like its predecessors, only the bottom screen of the DSi is a touch screen.
No. The screens are indistructible. The screens cannot be scratched.
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The Nintendo DSi, like the two previous incarnations of the DS, has two screens, one a non-touch screen and one touch screen.
No. They make a seperate monitor that is a touch screen. You can't make one out of a current monitor because the screens are made out of two different things.
Yes, the newest Kobo eReader, the Kobo WiFi Touch has a touch screen. The older models (such as the Kobo WiFi) do not have touch screens.
Some Alltel Blackberry smart phones do have touch screens. The Blackberry torch, and Blackberry storm do have touch screens. The Blackberry Pearl, Blackberry curve, Blackberry style, and Blackberry bold do not have touch screens.
Not all PDA's have touch screen,only the newer versions.
No, you can't.