Computer Hardware.ppt

MAIN COMPUTER SYSTEM

Computer hardware and its FunctionMonitorA computer monitor is like a television monitor that displays images.Example : a) Standard computer monitors

b) Liquid Crystal Displays (LCD)

KeyboardThe keyboard is the main input device for text and commands

SpeakersComputer speakers give out information in the form of sound.

Mouseuses it to control the movement of the cursor or pointer on a display screen.

System Unitalso known as a base unitis the main body of a desktop computer

Printeris a device that prints a hard copy of documents and graphics stored in electronic form into paper

computer system processes

INPUT DEVICES

Input devices are electronic devices connected to a computer that produce input signals. Below are some of the examples of input devices

OUTPUT DEVICESAn output device is hardware that is capable of delivering information to one or more users. An output device shows, prints and presents the results of a computers work.

STORAGE DEVICESComputer storage holds of data in an electromagnetic form to be accessed by a computer processor.

PRIMARY STORAGESECONDARY STORAGEKnown as the main memory of a computer.Alternative storage in a computer.RAM / Examples : Floppy disc, Hard disk, CD-ROM, USB driveStorage capacity is limited. Storage capacity is larger. An internal memory (inside the CPU) that can be accessed directly by the processor.Refers to various ways a computer can store program and data.Has a volatile memory for RAM and non-volatile memory for Is non-volatile, which means that it does not need power to maintain the information stored in it.

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