Here's a source:
http://www.rockmedia.com/kbox.html

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>>>How is it with entering of characters? The users will enter their names and address etc. Any ideas?
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>>>Do I need to require a 17 inch screen? I can imagine if they buy a 14 inch screen it get's difficult with the large controls...
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>>Not recommended. Take a look at a modern building directory. They display a large on-screen 'keyboard' (upper case only) so you enter the first few characters of a company name to narrow the search and then pick from a list - but you'd need the patience of Job to enter a full name AND address!
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>>You can also find them in some modern record or book stores - take a look, give them a try.
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>We do not have bookstores or similar locations that use touchscreens on our island. It would be very helpful for me to see some examples (screenshots?) of touchscreen applications (for general public use)!
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>I'm having a hard time to explain the users to explain what they need to do, especially how to use the touchscreen (click with the finger on the button etc.)
>Could somebody give me some examples of introdutory explanations that could appear on the first page, so all users really understand how to use the system? I would be very thankful for any input.