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17 Cards in this Set
- Front
- Back
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binary system
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Number system used by computers that has just two unique digits, 0 and 1, called bits.
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bit
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The smallest unit of data a computer can process. Bit is short for binary digit
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byte
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Eight bits that are grouped together as a unit. A byte provides enough different combinations of 0s and 1s to represent 256 individual characters.
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memory
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Electronic components in a computer that store instructions waiting to be executed by the processor, the data needed by those instructions, and the results of processing the data.
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volatile memory
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Type of memory that loses its contents when a computer's power is turned off.
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nonvolitile memory
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Type of memory that does not lose its contents when a computer's power is turned off.
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Ram Memory
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Type of memory that can be read from and written to by the processor and other devices. Programs and data are loaded into random access memory from storage devices such as a hard disk and remain in random access memory as long as the computer has continuous power. See also main memory.
See page198 |
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ROM memory
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Type of nonvolatile memory that is used to store permanent data and instructions.
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memory module
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Small circuit board that houses RAM chips and is held in a memory slot on the motherboard.
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memory slot
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Slots on the motherboard that hold memory modules.
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cache
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Area of memory that stores the contents of frequently used data or instructions.
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L1 cache
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A type of memory cache that is built directly into the processor chip, with a capacity of 8 KB to 16 KB.
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L2 Cache
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A type of memory cache that is slightly slower than L1 cache, but has a much larger capacity, ranging from 64 KB to 16 MB.
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Flach Memory
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Type of nonvolatile memory that can be erased electronically and rewritten.
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CMOS
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Technology used by some types of memory chips that provides high speeds and consumes little power by using battery power to retain information even when the power to a computer is off.
See page203 |
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Access time
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Measurement of the amount of time it takes the process to read data, instructions, and information from memory.
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nanosecond
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one billionth of one second
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