Computers for multiprocessing and parallel processing
The computers in this section are probably the most general in the book. Although the general PMS model for a computer in Chap. 3, page 65, characterizes these computers, the structure by Lehman (Chap. 37) most closely fits the model. The Burroughs computers that are presented have multiple Pc's;' however, K's are used for control of device K's, rather than Pio's-perhaps a wise choice.
D825-a multiple-computer system for command and control
The Burroughs D825 computer is discussed, together with other stack processors, in Part 3, Sec. 5, page 257. Chapter 36 emphasizes the PMS structure and operating system characteristics necessary in a multiprocessor system.
Design of the B 5000 system
This computer (Chap. 22) is discussed, together with other stack processors, in Part 3, Sec. 5, page 257.
A survey of problems and preliminary results concerning parallel processing and parallel processors
Chapter 37, by M. Lehman, provides a very good introduction to the concepts of multiprogramming, multiprocessing, and parallel processing. A specific multiprocessor computer structure is postulated to provide parallel processing. The processing ability of the structure is analyzed at the instruction level. It is significant that the paper is by an IBM scientist. IBM has not been particularly advanced in the use of multiple arithmetic processor computers.
1As does the B 8500, a successor to the D825; however, its successor, the B 8501, is designed with Rio's.