Java exposed the same abstract machine as a PDP-11 too. The key "PDP-11" thing is that all memory is treated as equally accessible, rather than the reality - i.

Java exposed the same abstract machine as a PDP-11 too. The key "PDP-11" thing is that all memory is treated as equally accessible, rather than the reality - i.e. that some memory is in caches on certain cores only and can therefore be accessed more efficiently on those cores.