
1) Kgbvax
Found on
https://www.crosswordclues.com/clue/kremvax

Kremvax was originally a fictitious Usenet site at the Kremlin, named like the then large number of Usenet VAXen with names of the form foovax. Kremvax was announced on April 1, 1984 in a posting ostensibly originated there by Soviet leader Konstantin Chernenko. The posting was actually forged by Piet Beertema of CWI (in Amsterdam) as an April Foo...
Found on
http://en.wikipedia.org/wiki/Kremvax

Kremvax was originally, a fictitious Usenet site at the Kremlin, announced on April 1, 1984 in a posting ostensibly originated there by Soviet leader Konstantin Chernenko. The posting was actually forged by Piet Beertema as an April Fool's joke. Other fictitious sites mentioned in the hoax were moskvax and kgbvax.
Found on
http://www.probertencyclopaedia.com/browse/AK.HTM
No exact match found.