Because there is always more storage space than RAM space, virtual memory increases the computer's capacity to do work. All modern CPUs have memory management units (MMUs) that support virtual memory.

Abstract: One of the basic limitations of a digital computer ... to exchange memory words and external-storage words whenever needed; this, of course, places an additional planning and coding burden ...

Abstract: One of the basic limitations of a digital computer ... to exchange memory words and external-storage words whenever needed; this, of course, places an additional planning and coding burden ...