A
light pen is a device connected to a
computer, that when pointed at a computer display senses whether or not the spot is illuminated. It then sends the information to the computer. The first light pen was used around
1957 on the
Lincoln TX-0 computer at the famed Lincoln Labs at
MIT. Light pens became moderately popular during the early
1980s but largely faded later in the decade with the rise of
mouse-based
WIMP interfaces as well as changes in
monitor technology.
See also: Graphics tablet
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