light pen
<hardware> An early pointing device which the user pointed at a
raster-scanned display screen. A photocell in the pen detected the flying spot
of the raster scan. The position of the spot at that instant, obtained from the
scanning electronics, was made available to software as (x, y) co-ordinates.
(2003-12-02)
Nearby terms:
light client « light-emitting diode « light-emitting
resistor « light pen » light pipe »
light-weight » Lightweight Directory Access Protocol
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