Short for Upper Memory Area, UMA is the area of RAM between 640 KB and 1,024 KB (1 MB) in legacy computers, that is made available to user applications as RAM. In DOS based systems, memory is split into five areas: conventional memory; upper memory; high memory; extended memory; and expanded memory. The UMA consists of upper memory blocks, and users can access this area through a special memory manager, such as EMM386.exe.

Computer acronyms, Memory terms

  • See the memory diagram for complete memory layout.
  • Memory (RAM) help and support.