0 a pen-shaped device used for reading bar codes --
1 a pen-shaped object that uses beams of light to read bar codes (= small rectangular patterns of printed lines that store data) or that you use to touch a computer screen in order to choose information: --
As the tip of the light pen makes contact with the screen, it sends a signal back to the computer containing the coordinates of the pixels at that point.
Another innovative feature for that time was the user interface combining a keyboard with a monitor and light pen used for correcting texts and drawing on screen.
Another innovative feature for that time was the user interface combining a keyboard with a monitor and light pen for correcting texts and drawing on screen.
The light pen found use during the early 1980s.
The 6845 had support for a light pen, an alternative to a computer mouse.
The right monitor, which played the preview video, was used by the editor to make cuts and edit decisions using a light pen.
The light pen allows the user to draw, to create images and to indicate, on the screen.
The other system, still in use in 2004, is based on a magnetic card and a voting machine with a light pen.
