The IBM 4820-21G Solution offers a selection of infrared touch screen monitors that are optimized for use in retail point-of-sale (POS) environment. These monitors, along with their associated features, are retail-hardened and designed to provide years of service in a worldwide marketplace. The IBM 4820-21G infrared touch monitors use a liquid crystal display (LCD) technology to provide high-brightness and picture contrast. An auto-adjust feature ensures a quality image automatically and a glare-proof finish is provided on the monitor glass. The sealed design on the front glass of the monitor protects the display area and internal components from environmental hazards such as liquids, dust, and cleansers, and an electrostatic discharge (ESD) immunity system provides heightened safety for users.
It was a normal CRT screen but around the edges where photodiodes pointing inwards as if to make an invisible infrared touch interface just half an inch in front of the screen. Quite impressive technology giving the times. As they go through the video showing us how it works a more sinister use of this new-fangled touch screen computer rears its ugly head, They turned it into a pretty cool remote-controlled gun turret complete with a motorized horizontal and vertical axis upon which an air pistol was placed along with a camera. You could see an image back from the camera on the screen, move the gun around to aim the weapon, then with a single finger press on the screen, your target has been hit.
The HP logic analyzer mainframes (165xx) with these touchscreens could use a mouse. If you had the -A or -B models, you would need to find a HP proprietary HP-IL bus mouse. If you had the -C, you could use any PS/2 mouse, or forget the display and remote control it from your PC with a standard remote X session.
In my very early working days I worked some days with one HP-150 that a customer had the strange idea to buy.I remember it was not very user-friendly : the touch-screen function had a very low resolution and the screen became quickly covered with mess (there was a weird anti-reflective film on the monochrome green screen which acted as a good finger cleaner).Due to the poor resolution, only big selection areas were possible. You could do the same with the Function Keys without the need to waste your time raising the arm (good workout though !).
The Ampex ACE video tape editing system had a touch screen interface option. I got to use it as a freelance editor. There is a nice demo here at 05:59: =5m59s I much preferred the dedicated keyboard interface.
Dauphin DTR-1 used a touch screen..Introduced:January 1993Available:May 1993Price:US$2,495Size:9 x 5.5 x 1.5-inches @ 2.5 lbsCPU:Cyrix 486SLC @ 25 MHzMemory:4MB-6MB RAMInterface:cordless pen, external keyboardDisplay:5 x 4-inch backlit grayscale LCD 6-inch diagonal640×480 VGA graphicsPorts:serial, parallel, videomodem, ethernet, PS/2 keyboardStorage:internal 20MB or 40MB HD optional external floppy driveOS:Microsoft DOS 6.0, Windows 3.1Power:12vdc, 2amp, tip positive