Primary Memory

A type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such as printers. There are two basic types of RAM: dynamic RAM (DRAM) and static RAM (SRAM).
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The area in a computer that serves as temporary storage for programs and data during program execution. The main memory resources directly available to a system’s CPU. Primary memory normally consists of volatile random access memory (RAM) and is a high- performance storage resource available to a system.
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Pronounced cash, a special highspeed storage mechanism. It can be either a reserved section of main memory or an independent highspeed storage device. Two types of caching are commonly used in personal computers: memory caching and disk caching. A memory cache, sometimes called a cache store or RAM cache, is a portion of memory made of highspeed static RAM (SRAM) instead of the slower and cheaper dynamic RAM (DRAM) used for main memory. Memory caching is effective because most programs access the same data or instructions over and over. Disk caching works under the same principle as memory caching, but instead of using highspeed SRAM, a disk cache uses conventional main memory. When data is found in the cache, it is called a cache hit, and the effectiveness of a cache is judged by its hit rate.
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Typically the largest RAM storage resource available to a computer. It is normally composed of a number of dynamic RAM chips and therefore must be refreshed by the CPU on a periodic basis; also known as main memory or primary memory.
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A storage medium, such as RAM, that loses its contents when power is removed from the resource.
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