“She typed them into a curious looking device, walked over to a huge machine that covered the whole face of the far wall, and inserted the flat disc into a slot.”
“I love the sound quality of vinyl, so I prefer listening to my favorite albums on a disc rather than streaming them online.”
“The agitator or pulsator is a propeller-like device, usually a concave disc fixed to the center, that creates the vertical-axis rotating action.”
diskette
(computing) A small, flexible, magnetic disk for storage and retrieval of data.