optical mark reader is a high-tech data input computer peripheral. nanhao omr has gained 6 patents and 12 computer software copyrights. our omr is famous for its excellent performances and low prices. it is very light and easy to operate. it can read thousands of information every second and nearly no error. nanhao omr can be widely used in education examinations, signing up, subject choice, data statistics and evaluation in fields such as education, vote, transportation, human resources, fiscal taxation and finance and so on. for example, our products have been used in the ministry of education of many foreign countries, including vietnam ministry of education, turkey ministry of education, and india high-school entry examination committee.