In my mind when I think of abstractions above the level of individual machines, I pretty much automatically go to Erlang as the only language that I know of tha

In my mind when I think of abstractions above the level of individual machines, I pretty much automatically go to Erlang as the only language that I know of that operates at the right level of abstraction for that. It's the only (semi-mainstream?) language that I know of that includes the infrastructure in the language itself to make the individual underlying machines (OS / hardware) appear irrelevant and allow programming to seamlessly span a group of computers.