How far the touchscreen will be located from its controller, and the controller from the host computer system are key concerns. Each touchscreen manufacturer has their own limitations on distance. If your computer system is not using a PC-based operating system such as Windows or Apple Macintosh or DOS, then you should verify that there is touchscreen support for the system software you're using. There are companies which offer special touchscreen software to accommodate UNIX, SUN and other such operating systems. All touchscreens are designed to operate when using your finger as the stylus or pointer.
Capacitive touchscreens require a conductive stylus, so gloves are typically excluded.
And SAW touchscreens won't respond using metal or non-energy absorbing objects. Carefully consider what the operator may use to touch the screen. Since most touchscreens are placed in front of the display's screen, light transmission will be reduced. Aside from the obvious environmental issues of placing products in public locations, another concern is periodic maintenance. Touchscreens require initial calibration to establish the proper touch field.