Before those, you had double density &quot;DD&quot; disks -- and extended density &quot;ED&quot; 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&#x2F;4 disks. IIRC, they were enough cheaper than 1440KB 3-1&#x2F;2 disks for close to the same storage.