R. Stewart Fayetteville High School 2008-2009 Types of Computers & Computer Hardware Computer Technology.

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Presentation transcript:

R. Stewart Fayetteville High School Types of Computers & Computer Hardware Computer Technology

R. Stewart Fayetteville High School Basic Terminology Computer A device that accepts input, processes data, stores data, and produces output, all according to a series of stored instructions. Hardware Includes the electronic and mechanical devices that process the data; refers to the computer as well as peripheral devices. Software A computer program that tells the computer how to perform particular tasks. Network Two or more computers and other devices that are connected, for the purpose of sharing data and programs. Peripheral devices Used to expand the computer’s input, output and storage capabilities.

R. Stewart Fayetteville High School Basic Terminology Input Whatever is put into a computer system. Data Refers to the symbols that represent facts, objects, or ideas. Information The results of the computer storing data as bits and bytes; the words, numbers, sounds, and graphics. Output Consists of the processing results produced by a computer. Processing Manipulation of the data in many ways. Memory Area of the computer that temporarily holds data waiting to be processed, stored, or output. Storage Area of the computer that holds data on a permanent basis when it is not immediately needed for processing.

R. Stewart Fayetteville High School Types of Computers

R. Stewart Fayetteville High School Microcomputer A personal computer; designed to meet the computer needs of an individual. Provides access to a wide variety of computing applications, such as word processing, photo editing, , and internet.

R. Stewart Fayetteville High School Desktop Microcomputer A microcomputer that fits on a desk and runs on power from an electrical wall outlet. The CPU can be housed in either a vertical or a horizontal case. Has separate components (keyboard, mouse, etc.) that are each plugged into the computer.

R. Stewart Fayetteville High School Laptop Computer A portable, compact computer that can run on an electrical wall outlet or a battery unit. All components (keyboard, mouse, etc.) are in one compact unit. Usually more expensive than a comparable desktop. Sometimes called a Notebook.

R. Stewart Fayetteville High School Workstation Powerful desktop computer designed for specialized tasks. Can tackle tasks that require a lot of processing speed. Can also be an ordinary personal computer attached to a LAN (local area network).

R. Stewart Fayetteville High School Supercomputer A computer that was the fastest in the world at the time it was constructed. Can tackle tasks that would not be practical for other computers. Typical uses Breaking codes Modeling weather systems

R. Stewart Fayetteville High School Mainframe Large expensive computer capable of simultaneously processing data for hundreds or thousands of users. Used to store, manage, and process large amounts of data that need to be reliable, secure, and centralized. Usually housed in a closet sized cabinet.

R. Stewart Fayetteville High School Server Purpose is to “serve.” A computer that has the purpose of supplying its users with data; usually through the use of a LAN (local area network).

R. Stewart Fayetteville High School Handheld Also called a PDA (Personal Digital Assistant). A computer that fits into a pocket, runs on batteries, and is used while holding the unit in your hand. Typically used as an appointment book, address book, calculator, and notepad. Can be synchronized with a personal microcomputer as a backup.

R. Stewart Fayetteville High School Computer Hardware

R. Stewart Fayetteville High School System unit Case that holds the power supply, storage devices, and the circuit boards (including the motherboard).

R. Stewart Fayetteville High School CPU (Central Processing Unit) Where the processing in a computer takes place, often called the brain of the computer.

R. Stewart Fayetteville High School Input Devices Units that gather information and transform that information it into a series of electronic signals for the computer.

R. Stewart Fayetteville High School Keyboard An arrangement of letters, numbers, and special function keys that act as the primary input device to the computer.

R. Stewart Fayetteville High School Mouse An input device that allows the user to manipulate objects on the screen by moving the device along the surface of a desk.

R. Stewart Fayetteville High School Sound Card A circuit board that gives the computer the ability to accept audio input, play sound files, and produce audio output through speakers or headphones.

R. Stewart Fayetteville High School Modem A device that sends and receives data to and from computers over telephone lines.

R. Stewart Fayetteville High School Output Devices Devices that display, print, or transmit the results of processing from the computer’s memory.

R. Stewart Fayetteville High School Monitor Display device that forms an image by converting electrical signals from the computer into points of colored light on the screen. Resolution The density of the grid used to display or print text and graphics; the greater the horizontal and vertical density, the higher the resolution. Pixels The smallest unit in a graphic image; computer display devices use a matrix of pixels to display text and graphics.

R. Stewart Fayetteville High School Storage Devices Used to keep data when the power to the computer is turned off. Different forms Hard disk Floppy or zip disks CD-Writer

R. Stewart Fayetteville High School Printer Output device that produces text or graphical images on paper.

R. Stewart Fayetteville High School Speakers Output devices that receive signals from the computer’s sound card to play music, narration, or sound effects.

R. Stewart Fayetteville High School Resource Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002.