OMR (optical mark recognition) is a form of automated data input. Marks are made on a specially printed paper forms which are then read by an OMR reader. The data is then sent to a computer for processing. One of the most common uses of OMR is in multiple choice examinations. Students mark their answers on specially printed sheets using either a pencil or a special marker. The sheets are then collected in and the data read using a sheet feed OMR scanner.