backspace• Allow for backspace at the start of each shot.• It is possible to make approximateallowance for backspace by releasing the source-machine off play-pause about one secondlate.• It has an irritatingly small backspacekey and I think it has a horribleplastic feel, but this is purely subjective.• Bear in mind, when you are starting a shot, that you should allow for the backspace time.• Remember to allow for the backspace time before starting each new shot or you may miss part of the action.
From Longman Business Dictionary
backspaceback·space /ˈbækspeɪs/ noun [singular]
the part of a computer KEYBOARD or TYPEWRITER that you press to move backwards towards the beginning of a line or to remove something that you have just written