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The OCR-A subheading contains six characters taken from the [[OCR-A]] font described in the ISO 1073-1:1976 standard: {{unichar|2440|OCR HOOK}}, {{unichar|2441|OCR CHAIR}}, {{unichar|2442|OCR FORK}}, {{unichar|2443|OCR INVERTED FORK}}, {{unichar|2444|OCR BELT BUCKLE}}, and {{unichar|2445|OCR BOW TIE}}. The OCR bow tie is given the [[Unicode character property#Name|informative alias]] "unique asterisk".
The hook, chair and fork, in addition to a long vertical bar, are included in the most basic "numeric" implementation level of OCR-A, which includes digits but excludes letters and conventional punctuation.<ref>{{cite web |url=https://ecma-international.org/wp-content/uploads/ECMA-8_2nd_edition_january_1977.pdf |title=Nominal Character Dimensions of the Numeric OCR-A Font |edition=2nd |id=ECMA-8 |year=1977 |author=European Computer Manufacturers Association |author-link=Ecma International}}</ref> By contrast, the most basic implementation level of [[OCR-B]] instead includes the digits, [[plus sign]], [[less-than sign]], [[greater-than sign]], long vertical bar and seven of the capital letters;<ref>{{cite web |url=https://www.open-std.org/JTC1/SC2/WG3/docs/n470.pdf#page=12 |page=8 |title=9.1: Subset 1: Minimal alphanumeric subset |work=Proposal for Type 3 Technical Report, TR 15907, Information technology—Revision of OCR-B standard (ISO 1073-2:1976) |id=ISO/IEC JTC1/SC2/WG3 N470 |date=1998-09-28 |author=ISO/IEC JTC1/SC2/WG3 |author-link=ISO/IEC JTC 1/SC 2}}</ref> as such, there are no characters specific to OCR-B in the Optical Character Recognition block.
===MICR===
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The following Unicode-related documents record the purpose and process of defining specific characters in the Optical Character Recognition block:
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! [[Unicode#Versions|Version]] !! {{nobr|Final code points<ref group=lower-alpha name=final/>}} !! Count !! [[International Committee for Information Technology Standards|L2]] ID !! [[ISO/IEC JTC 1/SC 2|WG2]] ID !! Document
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| rowspan="4" | 1.0.0 || rowspan="4" | U+2440..244A || rowspan="4" | 11 || || || (to be determined)
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| {{nobr|[https://www.unicode.org/L2/L2010/10416.htm L2/10-416R]}} || || {{Citation|title=UTC #125 / L2 #222 Minutes|date=2010-11-09|first=Lisa|last=Moore|ref=none|section=Consensus 125-C39|quote=Create two formal aliases, U+2448 MICR ON US SYMBOL and U+2449 MICR DASH SYMBOL for Unicode 6.1.}}
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| || [https://www.unicode.org/wg2/docs/n4103.pdf N4103] || {{Citation|title=Unconfirmed minutes of WG 2 meeting 58|date=2012-01-03|ref=none|section=T.3. Optical Character Recognition}}
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| {{nobr|[https://www.unicode.org/L2/L2022/22065-edcom-rept-utc171.html L2/22-065]}} || || {{Citation|title=Editorial Committee Report and Recommendations for UTC #171Meeting|date=2022-04-13|first=Ken|last=Whistler|ref=none|section=Opt Subject: Unicode 14.0 "Optical Character Recognition" code chart [Affects U+2447]}}
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| colspan="6" | {{reflist|group=lower-alpha|refs=<ref name=final>Proposed code points and characters names may differ from final code points and names</ref>}}
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