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Published bySylvia Sparks Modified over 9 years ago
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Classification of Computers
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How Many Classes Are There? 4, they are: Microcomputers Minicomputers Mainframe computers Supercomputers
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Microcomputers PERSONAL COMPUTERS - also known as PCs LAPTOPS ELECTRONIC ORGANIZERS/ PALMTOP COMPUTERS
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Characteristics of PCs One user Small size & low cost Easy to use Consists of system unit, keyboard, mouse, display screen Used for personal applications
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Characteristics of a Laptop PPortable computer FFlat display screen WWeighs about 1 to 4 kg
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Types of Laptops Notebook computers Weigh about 2- 4 kg Approximately 35 x 25 x 4 cm. Equipped with touchpad or track ball Sub-notebook computers Weighs about half a kilogram Can fit in a jacket pocket Can perform some of the functions of notebooks
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Characteristics of Electronic Organizers & Palmtop Computers Fits in the palm of your hand Smaller Less powerful than notebooks & sub-notebooks Stylus for data entry and making selections
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Minicomputers oAoAre outdated oCoCost and capabilities >micro & mainframe< oFoFacilitates (10 – 60 users) oDoDifficult to use oEoEach user has a terminal >>> accesses the main computer oUoUsed by medium sized organizations, colleges, libraries, banks, research labs
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Mainframe o Very large and powerful o Very expensive o More powerful than a minicomputer o Over 100 users at a time o Difficult to use o Found in large organizations: banks, government departments and insurance companies.
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SUPERCOMPUTERS (monsters) Largest Fastest Most powerful Most expensive Main uses: complex scientific applications – space exploration medicine industry
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Embedded Computers o So S pecial-purpose computer o Used inside a device o For specific functions o Connected to a sensor Found in – washing machines cars microwaves clocks cameras
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ASSESSMENT
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