What is the ASCII code chart? Codes 0 to 31 are not used for characters They are called control characters because they are used for actions like: Carriage return (CR). Bell (BEL). Codes 65 to 90 ...

ASCII's spiritual predecessor might have been ancient Assyrian, but it is a direct descendant of Baudot code, a scheme patented by Émile Baudot in 1874 for use in telegraphy. (The term "baud ...

And the convention for ctrl keystrokes has everything to do with ascii. And windows is abiding by an ascii convention, in that using SUB for EOF isn't breaking that convention.