There are economic advantages to time-sharing a facility with hybrid resources. It is quite unlikely that any single hybrid problem will be able to utilize all of the system resources 100 percent of the time. This is the same kind of reasoning that leads one to consider time-sharing for conventional digital problems. However, time synchronous real-time hybrid time-sharing and non-synchronous non-real-time digital timesharing are quite different problems, with the former posing some considerable difficulty to sequential digital machines.
['Theodore R. Strollo', 'Raymond S. Tomlinson', 'Edward R. Fiala']
A time shared I/O processor for realtime hybrid computation