English version

light pen in Computers topic

From Longman Dictionary of Contemporary Englishlight penˈlight pen noun [countable]  TDa piece of equipment like a pen, used to draw or write on a computer screen
Examples from the Corpus
light penAnd when the program is ready, the student enters it simply by moving a light pen across the bar codes.When the light pen is moved over the code, it triggers the chips to make sound through the loudspeaker.