MonitorA monitor is a computer display that is like a TV monitor. A computer monitor image is made up of pixels (dots). In general, the higher the resolution, the better the image. The smaller the dots pitch (typically from 0.25 mm to 0.31 mm), the better the image. The different types of display screens are: Standard television set
Standard computer monitors
Liquid Crystal Displays (LCD)
KeyboardThe keyboard is the main input device for text and commands. The computer keyboard uses the same key arrangement as typewriters. It also contain standard function keys, such as the escape, cursor movement and control keys. Keyboards come with three (3) different types of port such as:SpeakersSpeakers give out information in the form of sound. Computer speakers range widely in quality and price. Computer speakers are typically packaged with computer systems in small plastic boxes with mediocre sound quality. The internal amplifiers requires an external power source, known as 'wallwart'. MousePS/2 port mouse A mouse is an input device used to controls the movement of the cursor or pointer on a display screen. It has right click, left click and double click to function An optical mouse uses camera technology and digital processing to compare and track the position of the mouse, rather than a ball and rollers used on PS/2 port mouse. A small LED (lightemitting diode) provides light underneath the mouse, helping to highlight slight differences in the surface underneath the mouse. It does not require maintenance or regular cleaning. (source : http://images.search.yahoo.com) System UnitA system unit is also known as a base unit. It is the main body of a desktop computer consisting of a metal or fibre enclosure containing the motherboard, power supply, cooling fans, internal disk drives, memory modules and expansion cards(such as video and network cards) that are plugged into the motherboard. (source : http://en.wikipedia.org/wiki/System_unit) PrinterA printer is a device that produces a hard copy (permanent human readable text or graphics) of documents stored in electronic form that prints texts or illustrations on paper. Many printers are used as computer peripherals and are attached by a printer cable to a computer that serves as a document source. There are many types of computer printers Dot-Matrix printer
Ink-Jet printer
Laser printerThe laser printer uses a laser beam to produce the best quality output. The speed of a laser printer is typically about 8 ppm (page per minute). Data Processing CycleThe computer system processes data into information through four operations; input, process, storage and output. The user enters the data by using an input device (such as keyboard, mouse) electronically and is processed by the processor. In the processing operation, data is manipulated to process or transform it into information The storage (such as hard disk, compact disc (CD), diskettes) holds data, information and programs. The output devices (such as monitor, printer) present the processed data as useful information products to the user
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I think it's fair to say that personal computers have become the most empowering tool we've ever created. They're tools of communication, they're tools of creativity, and they can be shaped by their user.
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