[from the ASCII mnemonic ENQuire for 0000101] An on-line convention
for querying someone's availability. After opening a
talk mode connection to someone apparently in heavy hack mode, one
might type SYN SYN ENQ?
(the SYNs
representing notional synchronization bytes), and expect a return of
ACK or NAK depending on
whether or not the person felt interruptible. Compare
ping, finger, and the usage
of FOO?
listed under
talk mode.