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Related Flashcards
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Cards In This Set
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Information
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Communication that has value because it informs
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Data
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Information converted into binary digital form
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Difference between data and information
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Data is raw material for processing while information is data that has been processed in such a way, as to be meaningful to the person.
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Analog Information
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Information that is continuous and can take on any of an infinite set of values.
Ex. Digital camera captures images and a microphone transmits sounds into a sound card inside the computer. |
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Digital Data
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Information that is restricted to a finite set of values and it uses a special way of digital information called binary information.
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Input
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Computers accept information from the outside world.
Ex. Keyboards and pointing devices. |
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Processing
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Computer perform arithmetic or logical operations on information.
Ex. CPU which is the central processing unit or brain of the computer. |
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Storage
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Computers store and retrieve information from memory and storage devices. Long term repositories for data.
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Output
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Computers communicate information to the outside world.
Ex. Video monitor, printer to produce paper printouts, and speakers to output sounds. |
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Peripherals
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A device that is attached to the compute such as a keyboard, mouse, monitor, and speakers.
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Keyboard
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 They put the information a person types into a program in the computer. Most keyboards have 80 to 110 keys and the layout is known as QWERTY. |
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Mouse
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 When you move the mouse on a surface it senses the motion and a signal is sent to the computer, and then the computer acts to how the mouse was moved or clicked. |
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OCR (Optical character recognition)
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 The mechanical or electronic translation of scanned images of handwritten or typewritten text into machine encoded text. |
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OMR (Optical mark recognition)
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 The process of capturing human marked data from document forms such as surveys and tests. |
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Barcodes
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 An optical machine readable representation of data which shows certain data on certain products. |
