Disk ][
The Disk II Floppy Disk Subsystem, often rendered as Disk ][, is a 5.25-inch floppy disk drive designed by Steve Wozniak at the recommendation of Mike Markkula, and manufactured by Apple Computer, Inc. It went on sale in June 1978 at a retail price of US$495 for pre-order; it was later sold for $595 (equivalent to $2,470 in 2021) including the controller card (which can control up …