A service stripe on the sleeve of an enlisted person's uniform.
A mark in either of two series placed on the field perpendicular to the yard lines and used for spotting the ball.
Any of the segments of the inbounds line marked on the field at the yard lines: they mark the point at which the ball is put back in play after it has been grounded outside an inbounds line.
Origin of hash-mark
Alteration of hatch