MUX, a Simple Approach to On-Line Computing An on-line system operating as part of a normal batch system for the CDC 6600 computer is described. The system, which required one man-year for initial software implementation, although basically simple, provides the necessary elements to input and modify files, submit them for batch execution, and provide results at the user's terminal. A multiplexer designed and developed as part of the project cost one man-year for design and checkout, and $16,000 for parts and fabrication. All aspects of the system are described, including design criteria, implementation, cost, overhead, and user reactions. CACM May, 1972 Christman, R. D. time-sharing, remote computing, on-line access, on-line computing, remote file manager, real time, multiplexer, implementation effort, operating overhead, user reactions, remote terminals, operating system 3.79 3.89 4.39 4.41 CA720503 JB January 31, 1978 11:04 AM 1657 4 2357 2080 4 2357 2357 4 2357 2357 4 2357 2357 4 2357 2536 4 2357 1523 5 2357 1829 5 2357 2035 5 2357 2357 5 2357 2357 5 2357 2357 5 2357