light pen Meaning in the Cambridge English Dictionary
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Meaning of “light pen” in the English Dictionary

"light pen" in British English

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light pennoun [C]

uk   us  
a pen-shaped ​device used for ​reading barcodes
(Definition of light pen from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"light pen" in Business English

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light pennoun [C]

uk   us   IT
a pen-shaped ​object that uses beams of ​light to read barcodes (= ​small rectangular ​patterns of ​printedlines that ​storedata) or that you use to ​touch a ​computerscreen in ​order to choose ​information: Outgoing ​inventory can be quickly ​checked with ​light pens ​connected to each ​terminal.
(Definition of light pen from the Cambridge Business English Dictionary © Cambridge University Press)
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