My first job was working on RSX11M (predecessor to VMS) on a PDP-11. One thing that I remember is that the virtual address space of a process was 64K (i.e. 16

My first job was working on RSX11M (predecessor to VMS) on a PDP-11. One thing that I remember is that the virtual address space of a process was 64K (i.e. 16 bit address) but the machine had 256K of RAM. I never used VMS as by that time I'd moved from minicomputers to microprocessors.