Editing Memory address (section)

===Logical addresses===
A [[computer program]] uses memory addresses to execute [[machine code]], and to store and retrieve [[data (computing)|data]].  In early computers, logical addresses (used by programs) and physical addresses (actual locations in hardware memory) were the same. However, with the introduction of [[virtual memory]] most [[application program]]s do not deal directly with physical addresses. Instead, they use [[logical address|logical]] or [[virtual address space|virtual addresses]], which are translated to physical addresses by the computer's [[memory management unit]] (MMU) and the operating system's [[Memory address#Address space in application programming|memory mapping mechanisms]].