Dysan was a storage media manufacturing corporation, formed in 1973 in San Jose, California, by CEO and former president C. Norman Dion of San Jose, California. It was instrumental in the development of the 5.25" floppy disk, which appeared in 1976. In addition to manufacturing floppies, tape drives and hard disks, Dysan also produced hardware and storage containers for the disks. After a brief re-opening in 2003, the company closed six months later under the direction of Dylan Campbell. * Dysan prototype 3-1/4" floppy disk * Dysan 200 megabyte disk pack, with the cover removed