The continent of Antarctica has its own TLD, “aq”. Only organisations which are signatories to the Antarctic Treaty can register “aq” TLD domain names of Antarctica.
The email system invented by Ray Tomlinson at ARPA wasn't considered important. It was not a directive of the defence organization and Tomlinson was very hushed-up about it. He told a colleague "Don't tell anyone! This isn't what we're supposed to be working on." [more...]