<communications> The error code displayed on line 25 of a IBM 3270 terminal (or a terminal emulator emulating a 3270) for various kinds of protocol violations and "unexpected" error conditions (including connection to a down computer). On a PC, simulated with "->/_", with the two centre characters overstruck.
"Broken arrow" is also military jargon for an accident involving nuclear weapons.
Try this search on Wikipedia, OneLook, Google
Nearby terms: Broadway « brochureware « broken « broken arrow » broker » broket » brontobyte