The first floppy disks, invented and made by IBM, had a disk diameter of . Subsequently and then became a ubiquitous form of data storage and transfer into the first years of the 21st century. By 2006, however, computers were rarely manufactured with installed floppy disk drives; -inch floppy disks can still be used with an external USB floppy disk drive. USB drives for -inch, 8-inch, and non-standard floppy disks are rare to non-existent. Some individuals and organizations continue to use older equipment to read or transfer data from floppy disks.