[very common] Hardware or software activity designed to start or keep
two machines or programs in synchronization as they {do protocol}.
Often applied to human activity; thus, a hacker might watch two
people in conversation nodding their heads to indicate that they have
heard each others' points and say "Oh, they're handshaking!". See
also {protocol}.
[glossary]
[Reference(s) to this entry by made by: {protocol}]