Computer Basics

The Computer: Generally, a computer is not a single device. A computer is made up of several devices that function together as a system. Examples of such devices that make up the computer include; monitor, motherboard, CPU, Main memory, expansion cards, power supply unit, optical discs drives, hard disk drive, keyboard, microphone, muse, printer, scanner, speakers, digital camera, webcam, CD burner, DVD writer etc.To start working on a computer one should learn about it various devices and how they function. The diagram below shows various hardware devices of the computer.

Computer

What is a computer? A Computer is a fast and accurate electronic device functioning under the control of instructions stored in its own memory, can accept data and process the data into useful information that is displayed before the user and can be stored for future use or reference.

QWERTY KEYBOARD

 The Keyboard: The main input device used for sending data to the computer. The keyboard pattern on the diagram is “QWERTY”. The name “Qwerty” comes from the first six letters in the top left alphabet row (below the number keys). Christopher Sholes, the inventor of the typewriter, designed this arrangement of charactes on a “QWERTY” keyboard in 1868.