What ⑁ means
It has a technical role in the OCR-A font.
In legacy OCR-A data exchange, Chair could fill the grave accent code position: the slot assigned to `.
OCR-A grew from numbers to a wider font
Optical character recognition (OCR) is software that reads print. OCR-A was designed for people and machines to read the same data. Its OCR-A lineage began with a U.S. numeric font in 1961; a version for letters and numbers added abstract symbols in 1966. ISO 1073-1, the OCR-A standard, described the set in 1976.
Technical and archival; outside OCR-A material, ask the sender what they intend.
Don't confuse it with
4Questions people ask
1Why does ⑁ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⑁
⑁\2441Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
