C is up to 4 plusses, arranged two above and two below. This is now a
"sharp" character in music terms, and is shown as "C#". Next will be CH
(hyper) and C$ (C expensive) and C% (works mostly). Maybe.
Cheers!
Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip