Interactive kiosks (Information kiosks) – an electronic kiosk (or computer kiosk or interactive kiosk) houses a computer terminal that often employs custom kiosk software designed to function while preventing users from accessing system functions. Indeed, kiosk mode describes such a mode of software operation. Computerized kiosks may store data locally, or retrieve it from a computer network. Some computer kiosks provide a free, informational public service, while others serve a commercial purpose (see mall kiosk). Touchscreens, trackballs, computer keyboards, and pushbuttons are all typical input devices for interactive computer kiosk. Touchscreen kiosks are commercially used as industrial appliances, reducing lines, eliminating paper, improving efficiency and service. Their uses are unlimited from refrigerators to airports, health clubs, movie theaters and libraries.