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A filter over the electrodes permits only non-polarized light to pass to the surface of the display, creating light and dark pixels. load—To move information from a storage device (such as a hard disk) into memory for processing. local area network—See LAN. logical drive—A section of a disk that is recognized by the operating system as a separate disk drive. A system’s logical drives may differ from its physical drives. For example, a single hard disk drive may be partitioned into two or more logical drives. M memory—Typically refers to the computer’s main memory, where programs are run and data is temporarily stored and processed. Memory can be volatile and hold data temporarily, such as RAM, or it can be nonvolatile and hold data permanently, such as ROM. A computer’s main memory is RAM. See also RAM, ROM. microprocessor—See Central Processing Unit (CPU). MIDI (Musical Instrument Digital Interface)—A standard for connecting musical instruments, synthesizers, and computers. The MIDI standard provides a way of translating music into a form computers can use, and vice versa. modem—Short for “modulator/demodulator.” A device that converts information from digital to analog, and back to digital, enabling information to pass back and forth between digital computers and analog telephone lines. Glossary Glossary N O P motherboard—The computer’s main circuit board that contains the processor, memory, and other primary components. MS-DOS prompt—See system prompt. multi-function drive—A DVD drive that can read and write to CD and DVD media. multimedia—A combination of two or more media, such as sound, animation, and video in a computer program or presentation. Musical Instrument Digital Interface—See MIDI. network—A collection of computers and associated devices that are connected by communications facilities. A network allows you to share data and peripheral devices, such as printers, with other users and to exchange electronic mail. non-interlaced—A method of refreshing a computer screen, in which each pixel of every line is refreshed as the electron beam scans across and down the screen. Compare interlaced. non-system disk—A disk for storing programs and data that cannot be used to start the computer. Compare system disk. online—Available through the computer. Online may refer to information being read from your own computer’s internal storage drive, such as online documentation or online Help, or to information coming from another company on a company network or the Internet. operating system—A set of programs that controls how the computer works. Examples of operating systems are the Windows Vista® Home Basic and Windows® 7 operating systems. optical disc drive—A drive which reads plastic coated discs on which information is recorded digitally, and uses a laser to read data, music, or videos. palette—See colo...

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