369 / | HD | DYNAMIC INFORMATION STORAGE OR RETRIEVAL |
93 | DF | SYSTEMS HAVING PLURAL PHYSICALLY DISTINCT INDEPENDENT TRACKS ON A SINGLE STORAGE MEDIUM SURFACE {4} |
96 | .~ Continuous consecutive storage or retrieval of interrupted track for single signal (e.g., automatic reversal) {1} | |
97 | DF | .~.~> Tracks transverse to a motion component |