What does HEX stand for?

What does HEX mean?

HEX	Hexadecimal Computing » Assembly
HEX	Hexadecimal Computing » Security
HEX	Hexadecimal Computing » Software
HEX	HEXadecimal Computing » Telecom
HEX	Hexadecimal Miscellaneous » Unit Measures
HEX	Hexadecimal Computing » Networking
HEX	Hexadecimal Governmental » NASA
HEX	Hex dump Computing » File Extensions
HEX	Helsinki Exchanges Business » Stock Exchange
HEX	Macintosh BinHex Encoded file archive (ASCII) Computing » File Extensions
HEX	Santo Domingo Herrera, Dominican Republic Regional » Airport Codes
HEX	Heat Exchanger Governmental » NASA
HEX	Hexagon Governmental » NASA