The Optical Character Recognition Block includes these characters: U+2440 ⑀ OCR HOOK U+2441 ⑁ OCR CHAIR U+2442 ⑂ OCR FORK U+2443 ⑃ OCR INVERTED FORK U+2444 ⑄ OCR BELT BUCKLE U+2445 ⑅ OCR BOW TIE
Wikipedia claims (wrongly, I believe) that these all originate in the OCR-A font specified by ISO 1073. However, ISO 1073-1:1976 and ISO 2033:1983 only contain the first three of these, as does ANSI X3.17-1981 and the much older ECMA-19. The latter three characters – inverted fork, belt buckle, and bow tie – do not appear in any of those standards and don’t seem to be an official part of OCR-A according to any reliable document I can find. Where do they come from? Cheers, Sławomir Osipiuk
