Q23. What are optical mark reader? How are they is used for data input?
Ans. OMR is input device. OMR stand for Optical Mark Reader. OMR is a special preprinted forms are designed with boxes. Each box is annotated is distinctly so that the user clearly understands what response she is marking. Such a document is red by a document reader, called Optical Mark Reader (OMR) which transcribes the marks into electrical pulses which are transmitted to the computer.