Before revision: An early portable player, a Sony Discman model D121 A Philips portable CD player disassembled The internal components of a Panasonic portable CD player A portable CD player is a portable audio player used to play compact disc' s .
After revision: An early portable player, a Sony Didiscscman model D121 A Philips portable CD player disassembled The internal components of a Panasonic portable CD player A portable CD player is a portable audio player used to play compact s .