LOTS student computing

floor1, northside, cabinet 5
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Students at Stanford's Low Overhead Timesharing System (LOTS).


Center left: Indicator light box from the Stanford Medical School ACME Timesharing and Data-accquistion System (1966-1972). Designed by Robert Flexer, Klaus Holtz, David Cummins, and Gio Wiederhold. These light boxes were mounted on the IBM 2741 terminals used to communicate with ACME, an early timeshared real-time system. The white light indicated `ACME IS ON', trigered on for several seconds by periodic pulses sent when the system was running and available to users. The yellow light `Waiting for you' indicated that a user action was expected, as hitting Return or Escape. The green light `Working for you' was triggered on for a brief period for every time slice allocated to this terminal's process -- triggers arriving when the light was already on were ignored. The red light `SPECIAL RUN ON' indicated that real-time data-acquistion was in process from some laboratory, so that the users would experience reduced responsiveness.
Such indicators were important when there was little experience with computing, and no visual feedback as mow provided on display terminals.

DECsystem-10 modified Memory Controller Board for LOTS [LOTS]

The number of users served by LOTS required more memory than was available in standard DEC configurations.

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