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23 Cards in this Set
- Front
- Back
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Data
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The raw values entered into, stored and processed by information systems. Data is usually a small piece of information.
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Inputs
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Inputs are the raw data that is fed into an information system. The data is fed in via input peripherals or devices.
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Storage
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Data is stored in an information system so that it can be utilised when required.
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Processing
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This is the term used to describe the way information sytems convert raw data into useful information. Includes calculating; sorting; searching; storing; drawing.
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Outputs
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Outputs are the visibe or audible result of data processing - information that can be used.
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Feedback
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This term is used when output from a system is used to influence subsequent input.
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Digital
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An electronic device is digital if data in it is represented as electrical 'on' and 'off' signals that correspond to binary digits and can be stored in computer memory.
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Analogue
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A device is analogue where data is represented as signals that vary within a predefined range.
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Bit
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A bit is a binary digit - a 1 or 0 (one or zero) used to represent data. The term is also used for the smallest unit of storage, which just stores a 1 or 0.
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Byte
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A byte is a small group of bits - normally eight bits - that is treated as a unit. It is usually the number of bits needed to store one character.
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Locations
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The main store of a computer, where data and instructions are held ready for use, is divided up into small, equally sized units called locations. The computer uses the unique address of a location to access it.
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K
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K is short for kilo. 1 Kb is one kilobyte - 1024 bytes.
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M
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M is short for mega. 1 Mb is one megabyte - 1048576 bytes.
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G
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G is short for giga. 1 Gb is 1024 MB - 1,073,741,824 bytes.
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Column
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All pages and screens can be split into what are called columns (top to bottom). Sometimes the text fits into one column like a book. Often, designers of printed and web-based pages divide the page into several columns.
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Fully justified
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Full justification arranges the text in a straight line on both the left- and right-hand margins.
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Centre justified
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Centre justified text is ragged on both sides but symmetrical in the centre of the page.
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Right justified
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Right-justified text will be straight only on the right, leaving the text ragged on the left.
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Left justified
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Left-justified text will be straight only on the left, leaving the text ragged on the right. This has the advantage of producing more regular word spacing.
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Point
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Type can be a variety of sizes measured in points. 26 point lettering is larger than 14 point.
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Serif
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Serif is an all-inclusive term for characters that have a line crossing the free end of a stroke e.g. Times New Roman.
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Sans serif
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Sans serif ("sans" meaning "without") typeface have no line crossing the free end of a stroke e.g. Arial.
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Font family
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The majority of fonts in common use have at least four variations in their families e.g. normal, italic, bold and underlined. By combining these attributes others can be obtained such as bold italic.
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