Editing Optical mark recognition (section)

==History==
Optical mark recognition (OMR) is the scanning of paper to detect the presence or absence of a mark in a predetermined position.<ref name="Haag" /> Optical mark recognition has evolved from several other technologies. In the early 19th century and 20th century patents were given for machines that would aid the blind.<ref name="bookrags" />

OMR is now used as an input device for data entry. Two early forms of OMR are [[paper tape]] and [[punch card]]s which use actual holes punched into the medium instead of pencil filled circles on the medium. Paper tape was used as early as 1857 as an input device for telegraph.<ref name="bookrags_a" /> Punch cards were created in 1890 and were used as input devices for computers. The use of punch cards declined greatly in the early 1970s with the introduction of personal computers.<ref name="Palmer, Roger C. 1989">Palmer, Roger C. (1989, Sept) The Basics of Automatic Identification [Electronic version]. Canadian Datasystems, 21 (9), 30-33</ref> With modern OMR, where the presence of a pencil filled in bubble is recognized, the recognition is done via an optical scanner.

The first [[mark sense]] scanner was the [[IBM 805 Test Scoring Machine]]; this read marks by sensing the electrical conductivity of graphite pencil lead using pairs of wire brushes that scanned the page. In the 1930s, Richard Warren at [[IBM]] experimented with optical mark sense systems for test scoring, as documented in US Patents 2,150,256 (filed in 1932, granted in 1939) and 2,010,653 (filed in 1933, granted in 1935). The first successful optical mark-sense scanner was developed by [[Everett Franklin Lindquist]] as documented in US Patent 3,050,248 (filed in 1955, granted in 1962). Lindquist had developed numerous standardized educational tests, and needed a better test scoring machine than the then-standard IBM 805. The rights to Lindquist's patents were held by the Measurement Research Center until 1968, when the [[University of Iowa]] sold the operation to [[Westinghouse Corporation]].

During the same period, [[IBM]] also developed a successful optical mark-sense test-scoring machine, as documented in US Patent 2,944,734 (filed in 1957, granted in 1960). IBM commercialized this as the IBM 1230 Optical mark scoring reader in 1962. This and a variety of related machines allowed IBM to migrate a wide variety of applications developed for its [[mark sense]] machines to the new optical technology. These applications included a variety of inventory management and trouble reporting forms, most of which had the dimensions of a standard [[punched card]].

While the other players in the educational testing arena focused on selling scanning services, [[Scantron]] Corporation, founded in 1972,<ref>{{cite web|url=http://www.bc.edu/research/nbetpp/publications/v2n3.html|title=The Marketplace for Educational Testing|work=Bc.edu|access-date=2015-07-03}}</ref> had a different model;  it would distribute inexpensive scanners to schools and make profits from selling the test forms. As a result, many people came to think of all mark-sense forms (whether optically sensed or not) as ''scantron'' forms.

In 1983, Westinghouse Learning Corporation was acquired by National Computer Systems (NCS). In 2000, NCS was acquired by [[Pearson Education]], where the OMR technology formed the core of Pearson's Data Management group.  In February 2008, M&F Worldwide purchased the Data Management group from Pearson; the group is now part of the Scantron brand.<ref>{{cite web|url=http://www.ncspearson.com/ |access-date=June 14, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100614075343/http://www.ncspearson.com/ |archive-date=June 14, 2010 |title=NCS Pearson, Inc.}}</ref>

OMR has been used in many situations as mentioned below. The use of OMR in inventory systems was a transition between punch cards and bar codes and is not used as much for this purpose.<ref name="Palmer, Roger C. 1989"/> OMR is still used extensively for surveys and testing though.