OMR Full Form is Optical Mark Reader. It is a method used to enter data into a computer. it is also called Optical Mark Recognition. OMR is capable of reading pen or pencil marks present in pre-defined places on a documents or papers. Usually it reads tick marks or responses to questions on papers. The absence of presence of the pen/pencil marks is then converted for further use.
OMR is normally used whenever there is a requirement to collect huge data sources at the same time or at a short period. The rate of error that can happen in OMR method is less than 1%. A typical example OMR application is the multiple-choice exam papers of students attending various public exams all over India. Usage of Bubble sheets is another application.