>Instead of one instruction counter, the TX-2 has 32 such counters which are assigned separately to different users of the computer, who then compete for operat

>Instead of one instruction counter, the TX-2 has 32 such counters which are assigned separately to different users of the computer, who then compete for operating time from instruction to instruction. A special part of the machine selects a particular user based partly on a predetermined priority schedule and partly on the current needs of that user. This multiple-sequence operation, in which many essentially independent instruction sequences interrupt and interleave one another, is an extension of the breakpoint operation found in DYSEAC of the National Bureau of Standards. Is this the first implementation of a process scheduler in a multi-user system?