Device photolithography: The mask shop information system

The Mask Shop Information System (MSIS) is a set of computer tasks which exist in a specially designed multi-programming environment within a PDP-9 computer, and which control the flow of jobs through the new mask-making facility. The main functions of MSIS are to accept job descriptions and to assign tasks and pass data to the various shop facilities so that these jobs can be efficiently processed. In addition, MSIS keeps statistics on the progress and problems of the shop and issues reports both periodically and upon demand.