Answer: spooling

AnswerCrossword Clue
SPOOLINGLoading a reel
SPOOLINGUnwinding
spoolingthe temporary storage of data for later output
spoolingBe wound on or off a spool
spooling(of an engine) Increase its speed of rotation, typically to that required for operation
spoolingWind (magnetic tape or thread) on to a spool