ISU Internal Security Unit: anti-corruption unit of the Victoria
Police
ITU International Telecommunications Union, the international telecommunications standards body
JANET Joint Academic Network (UK), a network of computers
JPL Jet Propulsion Laboratory—a California-based NASA research centre affiliated with CalTech
LLNL Lawrence Livermore National Laboratory (US)
LOD Legion of Doom
Lutzifer West German computer, connected to the X.25 network, which had a chat facility
MFC Multi Frequency Code (Group III): inter-exchange telecommunications system used by Telstra (Telecom)
MILNET Military Network: TCP/IP unclassified US DOD computer network
MOD Masters of Deception (or Destruction)