Macintosh Font X encoding

Macintosh Font X is a character encoding which is used by Kermit to represent text on the Apple Macintosh (but not by standard Mac OS fonts). It is a modification of Mac OS Symbol to include all characters in DEC Special Graphics and the DEC Technical Character Set (unifying the ⎷ and √ from the 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.