| 369 / | HD | DYNAMIC INFORMATION STORAGE OR RETRIEVAL | 
| 99 | DF | SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4} | 
| 127 | DF | .~ Mechanical modification or sensing of storage medium {6} | 
| 135 | DF | .~.~ Specified structure of electrical transducing assembly {11} | 
| 150 |  | .~.~.~ Capacitive or electrolytic liquid |