Chapter-notes-BTM-200-2 - Chapter 2 Understanding your...

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Chapter 2 – Understanding your computerComputer: gathers data, processes data into information, outputs and stores data and informationData: a representation of a fact, a figure, or an idea (number, word, picture, sound)Information: data that has been organized or presented in a meaningful fashion Processing: manipulating, calculating or organizing data into informationBinary language: language of computers, consists of only 0 and 1 oBinary digit: each 1 and 0oByte: 8 binary digitsoWhat the computer uses to represent the data and information that it inputs and outputs oKilobyte (KB): 1000 bytesoMegabyte (MB): 1 million bytesoGigabyte (GB): 1 billion bytesoTerabyte: 1 trillion bytesoPetabyte, Exabyte, zettabyte Hardware: any part of the computer you can touchSoftware: set of computer programs that enables the hardware to perform different tasks oApplication software: set of programs used to write a paper for exampleoSystem software: set of programs that enables your computer’s hardware devices and application software to work togetherOperating system (OS): the program that controls the way in which your computer system functions – manages the hardware of the computer systemNotebook computer or laptop: portable computer that is powered by batteries – keyboard, monitor and other devices integrated into a single compact caseNetbook – small notebook computer 7 to 10 inches wide with a longer battery lifeTablet PC: similar to notebook but has a touch sensitive screen that can swivel and fold flat Desktop computer: single use location – main components plus peripheral devices
oPeripheral device: component such as a monitor or keyboard connected to the computeroAll in one computer such as the apple iMacMainframe: large, expensive computer that supports hundreds of users simultaneously - good at executing different computer programs at the same timeSupercomputer: specially designed computer that can perform complex calculations extremely rapidly – execute few programs as quickly as possible Embedded computer: specially designed computer chip that resides in another device such as a thermostat – don’t receive input or interact with other systems INPUT DEVICESInput device: enables you to enter data and instructions into the computer (keyboard, mouse) – stylus, pen with no inkQWERTY keyboard: standard English-language keyboard layout – slows typists down Dvorak keyboard – alternative keyboard – puts most commonly used letters in the English language on “home keys” – reduces travel distance, increasing typing speed Alternatives: flexible keyboards, virtual laser keyboard, DX1Wireless keyboards use a form of wireless technology that uses radio frequency – 6 to 30 feet away some as far as 100 Optical mouse, trackball mouse (ball on top or on the side), touch pad (laptop), trackpoint device (laptop little joystick), wireless mice (use batteries and send data via radio frequency or bluetooth), Apple Magic mouse (like macbook trackpad), MoGo mouse

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