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Fabricant : Toshiba Taille : 3.13 mb Nom Fichier : Langue d'enseignement:

The extension indicates the type of file. Examples are .exe for program files and .hlp for help files. See also file name. folder — Also called directory. A container for organizing files saved to a disk. A folder is symbolized on screen by a graphical image (icon) of a file folder. A folder can contain files and other folders. format — (verb) To prepare a blank disk for use with the computer’s operating system. Formatting creates a structure on the disk so the operating system can write information to the disk or read information from it. frontside bus — The primary pathway (bus) between the CPU and the computer’s main memory. Also called “system bus.” See also bus. function keys — The keys labeled F1 through F12, typically located on the keyboard. Their function is determined by the operating system and/or individual programs. gigabyte (GB) — A unit of data equal to 1,073,741,824 bytes (1024 x G 1024 x 1024 bytes). See also byte. Glossary 265 Terms ground — A conductor to which all components of an electric circuit are connected. It has a potential of zero (0) volts, is connected to the earth, and is the point of reference for voltages in the circuit. hard disk — A storage device composed of a rigid platter or platters that H can be magnetically coded with data. Hard disks hold much more information than diskettes and are used for long-term storage of programs and data. The primary (or only) hard disk in a computer is usually fixed, but some computers have secondary hard disks that are removable. By default, the hard disk is referred to as drive C. hardware — The physical components of a computer system. Compare software. Hibernation — A feature of many Toshiba notebook computers that saves to the hard disk the current state of your work, including all open files and programs, when you turn the computer off. When you turn on the computer again, your work is returned to the same state it was when the computer was turned off. See also Standby, Suspend. high-density diskette — A 3.5-inch diskette that holds 1.44 MB of data. See also diskette. hot key — (1) A feature in which certain keys in combination with the Fn key can set system options or control system parameters, such as the battery save mode. (2) A key or combination of keys that activates a memory resident program. hot swapping — The ability to add or remove devices from a computer while the computer is running and have the operating system automatically recognize the change. icon — A small image displayed on the screen that represents a function, file, or program. interlaced — A method of refreshing a computer screen, in which only every other line of pixels is refreshed. Interlaced monitors take two passes to create a complete screen image. Compare non-interlaced. internal device — See device. Internet — The decentralized, world-wide network of computers that provides electronic mail, the World Wide Web, and other services. See also World Wide Web. Glossary Terms 266 K M keyboard shortcut — A key or combination of keys that you use to perform a task instead of using a pointing device such as the AccuPoint. kilobyte (KB) — A unit of data equal to 1024 bytes. See also byte. L1 (level one) cache — Memory cache built into the processor to help improve processing speed. See also cache, CPU cache, L2 cache. L2 (level two) cache — Memory cache installed on the motherboard to help improve processing speed. It is slower than L1 cache and faster than main memory. See also cache, CPU cache, L1 cache. LAN (local area network) — A group of computers or other devices dispersed over a relatively limited area and connected by a communications link that enables any device to interact with any other on the network. liquid crystal display (LCD) — A type of display that uses a liquid substance between two transparent electrode panels. When an electric current passes through the electrodes, the molecules in the liquid form a crystalline pattern that polarizes the light passing through it. 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. megabyte (MB) — A unit of data equal to 1,048,576 bytes (1024 x 1024 bytes). See also bytes. 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 RAM, ROM. microprocessor — See central processing unit (CPU). Glossary 267 Terms N O P MIDI (M...

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