For example, pressing "control" and the letter "g" or "G" (code 107 in octal or 71 in base 10, which is 01000111 in binary, produces the code 7 (Bell, 7 in base 10, or 00000111 in binary). The NULL character (code 0) is represented by Ctrl-@, "@" being the code immediately before "A" in the ASCII character set. For convenience, a lot of terminals accept Ctrl-Space as an alias for Ctrl-@.