Andrew wrote...
BOG (no, not the toilet!)
Absolutely no
clue.
Could it be BOT, which is Begining Of Tape (one of the sensors in a tape
drive, the other being EOT (End Of Tape).
Or SOG, neaning Sync On Green, refering to an analogue RGB video monitor
where the gree nvideo signal is in fact composite video and includes the
sync signal.
-tony