is an acronym for random access memory.
It’s a memory device where data can be written or retrieved
randomly. There are two
types of RAM, dynamic RAM (DRAM) and static RAM (SRAM).
DRAM differs from SRAM by the fact that DRAM (a) has to be
consistently refreshed otherwise stored data in the memory will be lost,
(b) is cheaper to produce, and (c) is commonly found inside many PC.
As for SRAM, it is more expensive to produce and is mostly used
as cache memory due to its fast access to data.
The similarity they share is that they are volatile meaning that
the stored data will be lost if electricity is not present.
Currently the most commonly used RAM is SDRAM, synchronous DRAM.
SDRAM synchronizes with the clock speed of the CPU to give the
CPU faster access to the memory. The
speed of SDRAM is measured differently than older DRAM. Instead of using nanoseconds, SDRAM is measured in megahertz,
MHz like the current microprocessor.
port that connects other peripheral device to the computer that can only
use a single data line at a time
Sound Card— It is used to generate sound from a computer.
Speaker—Some speaker can be internal or external that transmits digital or analog data into sound.
USB—The Universal Serial Bus is another more versatile port.
Zip Drive—A drive that uses a removable cartridge that's about the same size as a floppy disk. Each disk can store 100-200 MB of data and can be retrieved much faster than a floppy disk.
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