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OMR is generally distinguished from optical character recognition (OCR) by the fact that a complicated pattern recognition engine is not required. That is, the marks are constructed in such a way that there is little chance that the OMR device will not read them correctly. OMR stands for Optical Mark Recognition, a technology that reads human-created marks on a specially printed paper or journal. Learn more about OMR , its applications, and examples on Testbook.com, a learning platform for ACC exam preparation. Definition and functionality of OMR (Optical Mark Reading), a critical input device for detecting and interpreting marks on printed forms, processing data. OMR sheets are a type of answer sheet used to key in answers prominently for multiple-choice questions. It is the preferred method of making candidates enter their answers in many competitive examinations and tests. A space (mostly in the form of circular shapes) is designated in every OMR sheet for each option under the given question and the student is expected to shade or mark the right option’s corresponding circle.