Chapter-notes-BTM-200-2.docx - Chapter 2 \u2013 Understanding your computer Computer gathers data processes data into information outputs and stores data

Chapter-notes-BTM-200-2.docx - Chapter 2 u2013...

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Chapter 2 – Understanding your computer Computer: gathers data, processes data into information, outputs and stores data and information Data: 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 information Binary language: language of computers, consists of only 0 and 1 o Binary digit: each 1 and 0 o Byte: 8 binary digits o What the computer uses to represent the data and information that it inputs and outputs o Kilobyte (KB): 1000 bytes o Megabyte (MB): 1 million bytes o Gigabyte (GB): 1 billion bytes o Terabyte: 1 trillion bytes o Petabyte, Exabyte, zettabyte Hardware: any part of the computer you can touch Software: set of computer programs that enables the hardware to perform different tasks o Application software: set of programs used to write a paper for example o System software: set of programs that enables your computer’s hardware devices and application software to work together Operating system (OS): the program that controls the way in which your computer system functions – manages the hardware of the computer system Notebook computer or laptop: portable computer that is powered by batteries – keyboard, monitor and other devices integrated into a single compact case Netbook – small notebook computer 7 to 10 inches wide with a longer battery life Tablet 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 o Peripheral device: component such as a monitor or keyboard connected to the computer o All in one computer such as the apple iMac Mainframe: large, expensive computer that supports hundreds of users simultaneously - good at executing different computer programs at the same time Supercomputer: 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 DEVICES Input device: enables you to enter data and instructions into the computer (keyboard, mouse) – stylus, pen with no ink QWERTY 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, DX1 Wireless 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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