001D Have you seen "Wargames"?
001E Do you know what ASCII stands for?
001F ... EBCDIC?
0020 Can you read and write ASCII in hex or octal?
0021 Do you know the names of all the ASCII control codes?
0022 Can you read and write EBCDIC in hex?
0023 Can you convert from EBCDIC to ASCII and vice versa?
0024 Do you know what characters are the same in both ASCII and EBCDIC?
0025 Do you know maxint on your system?
0026 Ever define your own numerical type to get better precision?