instrumentation (a piece of equipment or tool) used to effect an end

wipe out digitally or magnetically recorded information

remove by or as if by rubbing or erasing

an eraser that removes chalk marks from blackboard

an eraser that removes ink marks

an eraser made of rubber (or of a synthetic material with properties similar to rubber); commonly mounted at one end of a pencil

A correction fluid or white-out, is an opaque, white fluid applied to paper to mask errors in text; once dried, it can be written over.