I'm pretty sure that's later development. Otherwise it would be called "prefix" or "extend". Unfortunately I cannot quickly find a better source than: "The "e

I'm pretty sure that's later development. Otherwise it would be called "prefix" or "extend". Unfortunately I cannot quickly find a better source than: "The "escape" character (ESC, code 27), for example, was intended originally to allow sending other control characters as literals instead of invoking their meaning." http://en.wikipedia.org/wiki/ASCII http://en.wikipedia.org/wiki/ASCII