Macintosh Font X encoding
Macintosh Font X is a character encoding which is used by Kermit to represent text on the Apple Macintosh. It is a modification of Mac OS Symbol to include all characters in DEC Special Graphics and the DEC Technical Character Set.
Characters at A4, A7, A9, D0, E1, and F1, along with the not sign at D8 are intended to assemble a 3x5 uppercase sigma.