| 360 / | HD | DYNAMIC MAGNETIC INFORMATION STORAGE OR RETRIEVAL |
| 88 | DF | RECORD TRANSPORT WITH HEAD STATIONARY DURING TRANSDUCING {4} |
| 97.01 | DF | .~ Disk record {6} |
| 98.01 | | .~.~ Plural disks {4} |
| 98.02 | DF | .~.~.~> Axially fixed flexible disks {1} |
| 98.04 | DF | .~.~.~> Changer {2} |
| 98.07 | DF | .~.~.~> Rotational drive detail |
| 98.08 | DF | .~.~.~> Seating of disks |