369 / | HD | DYNAMIC INFORMATION STORAGE OR RETRIEVAL |
99 | DF | SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4} |
100 | DF | .~ Radiation beam modification of or by storage medium {20} |
121 | .~.~ With particular light source (e.g., laser, CRT with phosphor) {2} | |
122 | DF | .~.~.~> Solid state |
123 | DF | .~.~.~> Glow lamps |