I know. I ran clusters of VAX boxes, in production, in the mid-1990s. An ordinary user app doesn't need to know. A file version control system does, though. De

I know. I ran clusters of VAX boxes, in production, in the mid-1990s. An ordinary user app doesn't need to know. A file version control system does, though. Development environments need to know. IDEs and programmers' tools need to know.