ITU is the International Telecommunications Union. Jamming is a type of transmission designed to disrupt the radio communications of an adversary so as to interfere with military operations. LAN is a local area network. Message store-forward is a system in which a message is uploaded to a satellite and held there until the satellite is in a position to download it to the destination. It is an alternative to bent-pipe systems.
Millennium is a military research effort to design an ultra-wideband radio.
Multipath propagation is a phenomenon in which copies of a transmitted signal arrive at different times at a receiver. NATO is the North Atlantic Treaty Organization. Packet is a collection of information symbols transmitted together on a communications channel. It was precompetitive research on advanced communications systems. It was superseded by the ACTS program.