| 365 / | HD | STATIC INFORMATION STORAGE AND RETRIEVAL |
| 52 | DF | HARDWARE FOR STORAGE ELEMENTS {3} |
| 55 | | .~ Magnetic {7} |
| 56 | DF | .~.~> Spacers |
| 57 | DF | .~.~> Keeper |
| 58 | DF | .~.~> Slot |
| 59 | DF | .~.~> Embedded conductor |
| 60 | DF | .~.~> Air gap |
| 61 | DF | .~.~> Hairpin conductor |
| 62 | DF | .~.~> Permanent magnet |