I'm sure it will be debatable but I think Burroughs B5000 should be on this list somewhere. http://www.smecc.org/The%20Architecture%20%20of%20the%20Burroughs%2

I'm sure it will be debatable but I think Burroughs B5000 should be on this list somewhere. http://www.smecc.org/The%20Architecture%20%20of%20the%20Burroughs%20B-5000.htm http://www.smecc.org/The%20Architecture%20%20of%20the%20Burr... If not for OS or interactivity, I think it should be on there for being the first machine with OS written in high-level language whose CPU was designed to safely execute it. Entry would go something like this: "5. High-level, safe execution of software." Benefits: Stuff crashed less. Hackers had harder time. Easier to expand or maintain. Drawbacks: Cost some performance due to higher level and some extra money for extra hardware. Exemplars: Ada language + secure, Ada chips. Java processors + OS's. SAFE and CHERI architectures. Maybe NonStop with hardware/software architecture applied to fault-tolerance. Erlang.