Discussion
An optical input device that interprets pencil marks on paper media is
Answer: A
Correct answer: O.M.R
Optical mark recognition shines light on a form and detects where the reflectance is reduced by a pencil mark, so the position of each filled bubble is read as an answer. It is how examination answer sheets and ballot forms are counted, and it reads marks rather than shapes, which is what distinguishes it from OCR.
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