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} |
128 | DF | .~.~ With electrical information signal processing {5} |
129 | .~.~.~ From information modulated oscillator |