| Blockname: | Optical Character Recognition |
| Rangestart: | 2440 |
| Rangeend: | 245F |
| Script1: | Common |
| Symbols: | OCR controls |
| Sources: | ISO 2033 |
| 1 0 0: | 11 |
| Note: | [1] [2] |
Optical Character Recognition is a Unicode block containing signal characters for OCR and MICR standards.
The Optical Character Recognition block has three informal subheadings (groupings) within its character collection: OCR-A, MICR, and OCR.[3]
The OCR-A subheading contains six characters taken from the OCR-A font described in the ISO 1073-1:1976 standard:,,,,, and . The OCR bow tie is given the 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.[4] 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;[5] as such, there are no characters specific to OCR-B in the Optical Character Recognition block.
The MICR subheading contains four punctuation characters for bank cheque identifiers, taken from the magnetic ink character recognition E-13B font (codified in the ISO 1004:1995 standard):,,, and .
The latter two characters are misnamed: their names were inadvertently switched when they were named in the 1993 (first) edition of ISO/IEC 10646, a mistake which had been present since Unicode 1.0.0.[6] Although their formal names remain unchanged due to the Unicode stability policy, they both have corrected normative aliases: U+2448 ⑈ is, and U+2449 ⑉ is (the standard notes that "the Unicode character names include several misnomers").
These symbols had previously been encoded by the ISO-IR-98 encoding defined by ISO 2033:1983, in which they were simply named through .[7] All four characters have informative aliases in the Unicode charts: "transit", "amount", "on us", and "dash" respectively.
The OCR subheading consists of a single character: .
The following Unicode-related documents record the purpose and process of defining specific characters in the Optical Character Recognition block:
| Count | L2 ID | WG2 ID | Document | |||
|---|---|---|---|---|---|---|
| 1.0.0 | U+2440..244A | 11 | (to be determined) | |||
| N4103 | ||||||