Dell Latitude 131L User Manual

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Contents

158 GlossaryPXE — pre-boot execution environment — A WfM(Wired for Management) standard that allows networkedcomputers that do not have an operating system to beconfigured and started remotely.RRAID — redundant array of independent disks — Amethod of providing data redundancy. Some commonimplementations of RAID include RAID 0, RAID 1,RAID 5, RAID 10, and RAID 50.RAM — random-access memory — The primarytemporary storage area for program instructions and data.Any information stored in RAM is lost when you shutdown your computer.readme file — A text file included with a software packageor hardware product. Typically, readme files provideinstallation information and describe new productenhancements or corrections that have not yet beendocumented.read-only — Data and/or files you can view but cannotedit or delete. A file can have read-only status if:• It resides on a physically write-protected floppy disk,CD, or DVD.• It is located on a network in a directory and thesystem administrator has assigned rights only tospecific individuals.refresh rate — The frequency, measured in Hz, at whichyour screen's horizontal lines are recharged (sometimesalso referred to as its vertical frequency). The higher therefresh rate, the less video flicker can be seen by thehuman eye.resolution — The sharpness and clarity of an imageproduced by a printer or displayed on a monitor. Thehigher the resolution, the sharper the image.RFI — radio frequency interference — Interference thatis generated at typical radio frequencies, in the range of10 kHz to 100,000 MHz. Radio frequencies are at thelower end of the electromagnetic frequency spectrum andare more likely to have interference than the higherfrequency radiations, such as infrared and light.ROM — read-only memory — Memory that stores dataand programs that cannot be deleted or written to by thecomputer. ROM, unlike RAM, retains its contents afteryou shut down your computer. Some programs essential tothe operation of your computer reside in ROM.RPM — revolutions per minute — The number ofrotations that occur per minute. Hard drive speed is oftenmeasured in rpm.RTC — real time clock — Battery-powered clock on thesystem board that keeps the date and time after you shutdown the computer.RTCRST — real-time clock reset — A jumper on thesystem board of some computers that can often be usedfor troubleshooting problems.SScanDisk — A Microsoft utility that checks files, folders,and the hard disk’s surface for errors. ScanDisk often runswhen you restart the computer after it has stoppedresponding.SDRAM — synchronous dynamic random-access memory— A type of DRAM that is synchronized with the optimalclock speed of the processor.serial connector — An I/O port often used to connectdevices such as a handheld digital device or digital camerato your computer.Service Tag — A bar code label on your computer thatidentifies your computer when you access Dell Support atsupport.dell.com or when you call Dell for customerservice or technical support.setup program — A program that is used to install andconfigure hardware and software. The setup.exe orinstall.exe program comes with most Windows softwarepackages. Setup program differs from the system setupprogram.shortcut — An icon that provides quick access tofrequently used programs, files, folders, and drives. Whenyou place a shortcut on your Windows desktop anddouble-click the icon, you can open its correspondingfolder or file without having to find it first. Shortcut iconsdo not change the location of files. If you delete abook.book Page 158 Wednesday, April 4, 2007 7:31 AM