Computer Input Device: Optical Mark Reader

Optical Mark Reader is a reader that detects marks in a certain position on a piece of paper. In this method, special printed forms are designed with boxes which can be marked with a dark pencil or ink. Each box is annotated distinctly so that the user clearly understands what response he/she marking. Such a document is read by a document reader which transcribes the marks into electrical pulses. These pulses are then transmitted to the computer. These types of documents are applicable in areas where responses are one out of a small number of alternatives.