Re: MIDI Web input
I'm guessing that "C-hash" looked like a hash-up, but C♯ was too difficult to type (without that MIDI input device).
Either way, it's an attempt to appropriate the linearly horizontal and vertical elements of the ++ part of C++ by superimposing one over the over but displaced a little bit.
You could do that with CSS, but life's too short.
-A.