Before those, you had double density "DD" disks -- and extended density "ED" disks after that. With the sleeve encased floppies you could even throw in single-s

Before those, you had double density "DD" disks -- and extended density "ED" disks after that. With the sleeve encased floppies you could even throw in single-sided and double-sided variants. Growing up, we had a lot of 1200KB 5-1/4 disks. IIRC, they were enough cheaper than 1440KB 3-1/2 disks for close to the same storage.