Disquete

"Above left: An 8-inch floppy and floppy drive next to a regular 3.5-inch floppy disk. Above right: The convenience of easily removable storage media.

The diskette, or floppy disk (named so because they were flexible), was invented by IBM and in common use from the mid-1970s to the late 1990s. The first floppy disks were 8 inches, and later in came 5.25 and 3.5-inch formats. The first floppy disk, introduced in 1971, had a capacity of 79.7 kB, and was read-only. A read-write version came a year later."