Its usage remains widespread in the encoding of checks around the world. The ⑂, ⑀ and ⑁ characters are used to delimit particular fields in the machine-readable line (shown here partially redacted).Īlthough optical character recognition technology has advanced to the point where such simple fonts are no longer necessary, the OCR-A font has remained in use. It was used in a "technology"-themed section of Rolling Stone. As a joke, Tobias Frere-Jones in 1995 created Estupido-Espezial, a redesign with swashes and a long s.
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In addition to these free implementations of OCR-A, there are also implementations sold by several vendors. On September 27, 2012, he updated his implementation to version 0.2. In 2011 he released a new version created by rewriting the Metafont definitions to work with METATYPE1, generating outlines directly without an intermediate tracing step. Independently, Matthew Skala used mftrace to convert the Metafont definitions to TrueType format in 2006.
Luc Devroye corrected the vertical positioning in John Sauter's implementation, and fixed the name of lower case z. In 2007, Gürkan Sengün created a Debian package from this implementation. To make the free version of the font more accessible to users of Microsoft Windows, John Sauter converted the Metafont definitions to TrueType using potrace and FontForge in 2004. That definition was subsequently improved by Richard B. Īs metal type gave way to computer-based typesetting, Tor Lillqvist used Metafont to describe the OCR-A font. The design is simple so that it can be easily read by a machine, but it is more difficult for the human eye to read. In 1968, American Type Founders produced OCR-A, one of the first optical character recognition typefaces to meet the criteria set by the U.S. There is also a German standard for OCR-A called DIN 66008.
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X3.4 has since become the INCITS and the OCR-A standard is now called ISO 1073-1:1976. The OCR-A font was standardized by the American National Standards Institute (ANSI)Īs ANSI X3.17-1981.
4.1 Pre-Unicode standard representation.
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