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The part of the computer that contains in- dicators and controls, such as the power switch, hard-disk drive access indicator, and power indicator.

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The first 640 KB of RAM. Conventional memory is found in all computers. Unless they are specially designed, MS-DOS®programs are limited to running in conven- tional memory.

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A chip that relieves the computer’s micro- processor of specific processing tasks. A math coprocessor, for example, handles numeric processing. A graphics coproces- sor handles video rendering. The Intel® Pentium® microprocessor, for example, in- cludes a built-in math coprocessor.

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Abbreviation for characters per inch.

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Abbreviation for central processing unit. See also microprocessor.

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A marker, such as a block, underscore, or pointer that represents the position at which the next keyboard or mouse action will occur.

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Acronym for digital audio tape.

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Abbreviation for decibel(s).

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Abbreviation for adjusted decibel(s).

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Abbreviation for direct current.

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A comprehensive set of diagnostic tests for your Dell computer. To use the diag- nostics, you must boot your computer from the Dell Diagnostics Diskette. Refer

to your Diagnostics and Troubleshooting Guide for more information about using the Dell Diagnostics.

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A DMI browser that allows you to view your computer system’s current hard- ware configuration and operating system version. If your system includes Dell- installed software, you can select this program from the Dell Accessories pro- gram folder.

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A program that allows the operating sys- tem or some other program to interface correctly with a peripheral device, such as a printer. Most device drivers are installed when the operating system is installed.

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Acronym for dual in-line memory mod- ule. A small circuit board containing DRAM chips that connects to the sys- tem board.

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Acronym for Deutsche Industrie Norm.

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Acronym for dual in-line package. A circuit board, such as a system board or expan- sion card, may contain DIP switches for configuring the circuit board. DIP switch- es are always toggle switches, with an ON position and an OFF position.

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Directories help keep related files orga- nized on a disk in a hierarchical, “inverted tree” structure. Each disk has a “root” di- rectory; for example, a &￿?! prompt normally indicates that you are at the root directory of hard-disk drive C. Additional directories that branch off of the root directory are called subdirectories. Sub- directories may contain additional directories branching off of them.

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See video adapter.

4 Dell Precision 410 Desktop Systems User’s Guide