What ␘ means
It labels CAN, an ASCII control; it does not run it.
ASCII defined CAN as a control character; its first edition dates to 1963. ANSI X3.32 (1973) and ISO 2047 (1975) standardized visible forms for normally nonprinting controls on paper-tape punches and diagnostic displays; Unicode carries the convention in the Control Pictures block.
CAN’s effect depended on the protocol: a 1976 newspaper-transmission standard used it to delete the preceding word; 1987 Videotex text-service control sets used it to stop macros or clear a line.
Technical and archival: it signals control-code inspection, not casual cancellation.
Don't confuse it with
1Questions people ask
1Will every font draw ␘ the same way?
No. Unicode’s reference shape is not prescriptive, so the box and diagonal may vary by font.
How to type ␘
␘\2418Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
