What is RAM?
An acronym for Random Access Memory (pronounced "ram"). RAM is memory that has information stored in such a way that any data element may be retrieved in the same amount of time.
A RAM device may be fabricated with several different technologies; one of the most common is based on transistors. These memory systems are fast, inexpensive, and reliable but they do have one drawback: when power is removed, all stored information is lost. Technically most memory systems are random access, for example, a read only memory (ROM) is a random access device. The term RAM, however, is generally applied only to semiconductor read/write memory. Various types of RAM are distinguished in the literature:
• DRAM (dynamic RAM)—which must be refreshed periodically in order to retain its information. Refresh periods are on the order of every few milliseconds.
• SRAM (static RAM)—which retains its contents as long as power is supplied.
• VRAM (video RAM)—which is used to provide memory for graphics processing or temporary image storage.
RAM. (2001). In Hargrave's Communications Dictionary, Wiley.
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