Stands for Manned Maneuvering Unit. Astronauts on board a NASA space shuttle can strap on this large rocket backpack and maneuver during a spacewalk (officially known as an Extra Vehicular Activity) instead of remaining tethered to the shuttle or to the Canadarm.
Minimum mapping unit. The smallest feature reported in an image. Although an image may have 30-meter pixels, the MMU can be reported at 60-meter pixels. This is frequently done to account for scale differences between analysis and to reduce reporting errors.
Minimum Mapping Unit. The smallest area (usually a polygon) mapped.
(memory management unit) (n.) In hardware, memory address mapping. Usually, the virtual addresses are mapped to physical addresses, but each system is different. See also physical address space, virtual address.
memory management unit. VentureCom
(Memory Management Unit). That part of a microprocessor which implements virtual-to-physical address translation and the memory system hierarchy including cache memory.
Memory Management Unit (MMU, "Paged Memory Management Unit", PMMU) A hardware device or circuit that supports virtual memory and paging by translating virtual addresses into physical addresses. The virtual address space (the range of addresses used by the processor) is divided into pages that are of the size 2^N, (1KB to 16MB in the case of PPC405). The bottom N bits of the address (the offset within a page) are left unchanged. The upper address bits are the (virtual) page number. The MMU contains a page table that is indexed (possibly associatively) by the page number. Each page table entry (PTE) gives the physical page number that corresponds to the virtual one. This is combined with the page offset to give the complete physical address. A PTE may also include information about whether the page has been written to, when it was last used (for a least recently used replacement algorithm), what kind of processes (user mode, supervisor mode) may read and write it, and whether or not it should be cached.
minimum mapping unit. the smallest area that is depicted on a map
Memory Management Unit. A device on many CPUs that alerts the OS if a process tries to access memory that's been allocated to another process.
memory management unit. a part of a processor, or a separate component, that implements virtual memory functions. A MMU translates virtual addresses from the processor into real addresses for the memory. [SILC99
emory anagement nit, part of the CPU hardware that enforces memory boundaries, and throw page faults, upon which the OS builds its coherent protection. The MMU maps virtual memory to actual, where protections allow.
memory management unit. Any component that performs address mapping in a Macintosh computer. In Macintosh II computers, it is either the Address Management Unit (AMU) or the Paged Memory Management Unit (PMMU). The MMU function is built into the MC68030 and MC68040 microprocessors.
See: memory management unit (MMU)
Manned Maneuvering Unit, a special jet-propelled backpack that enables Shuttle astronauts to work without a tether to the spacecraft.
Memory Management Unit CPU component which maps kernel- and user-space virtual addresses to physical addresses, and is an integral part of Linux kernel operation.
Manned Manoeuvring Unit - a jet backpack worn by astronauts which lets them whizz around in space.
