main memory


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main memory

[′mān ′mem·rē]
(computer science)

main memory

(storage, architecture)
The storage device used by a computer to hold the currently executing program and its working data. A modern computer's main memory is built from random-access memory integrated circuits. In the old days ferrite core memory was one popular form of main memory, leading to the use of the term "core" for main memory.

Computers have several other sorts of memory, distinguished by their access time, storage capicity, cost, and the typical lifetime or rate of change of the data they hold. Registers in the CPU are fast, few, expensive and typically change every few machine instructions. Other kinds are cache, PROM, magnetic disk (which may be used for virtual memory) and magnetic tape.

main memory

The primary, internal workspace in the computer. When a computer specification states 4GB of RAM, it refers to the main memory. See memory.
References in periodicals archive ?
To that end, McGaughan says that IBM has dropped main memory prices for all machines but the entry pSeries 615 by 20%.
Without this upgrade, the system memory capacity was limited to a total of 640 MB of main memory as currently specified in Apple documentation.
As the newest addition to Samsung's DDR SDRAM portfolio, the 400Mbps (200MHz) DDR devices are ideal for use as PC system main memory, offering three times the performance of Single-Data-Rate PC 133 SDRAM and 50 percent more bandwidth than mainstream DDR266.
a provider of main-memory database solutions, has introduced the Angara Data Server, a full-featured relational database management system (RDBMS) that uses main memory as the primary data store.
the world leader in advanced memory technology, today announced that it is leading the industry shift from DDR1 (Double Data Rate 1) to DDR2 main memory.
The DS10 is a 3U server that uses the prior generation of EV68 processors, and the DS15 includes a faster 1GHz EV68 processor as well as faster main memory and more I/O bandwidth.