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Input devices are computer equipment that we use to sends data into the computer. Without input devices, we cannot communicate with the computer. Some examples of input devices are: Input Devices Keyboard Mouse Tracker ball Joystick Light pen Digital Camera Microphone Touch screen Video Digitizer Graphics tablet Scanner   Output Devices Output devices are computer equipment that enables us to see the information processed by the computer. Output devices enable us to know what the computer is doing or has already done. Monitors or Visual Display Units (VDU's) Printers Plotters Other devices Speakers LCD projectors

Computers and Data In order to understand data we need to process it. In other words, data must be taken through a number of processing stages in order to generate Information. Any technique in which data is retrieved, stored, classified, manipulated, transmitted and/or reported in such a way as to generate information; especially such processing using computers is called Data Processing . Computers can perform all kinds of processing. From simple and complex calculations, classifications, arranging jumbled text alphabetically and vise versa as well as analyzing pictures and sounds. Stages in Information Processing Information is processed in three major stages . This is called the Information processing cycle . In stage 1 , data is collected from various sources. In stage 2 , the data is processed by various computer techniques in order for it to make sense to us. The final output in stage 3 is what we call Information. Lastly, the computer stores the information in i...

The Keyboard A keyboard is a rectangular computer equipment with buttons otherwise known as "keys". Each key represents the letter, symbol or number printed on it. It is an input device used for sending data to the computer. Punctuation Marks A simple paragraph may contain several punctuation marks. Punctuation marks are symbols used to clarify the content of a written material, i.e. separating words into sentences, clauses and phrases. Punctuation keys can be found on a keyboard. If you look closely at your keyboard you will realize that there are two punctuation marks on a punctuation key. Typing punctuation keys that do not involve the  SHIFT key To type the punctuation mark at the bottom of the key, simply press the key. However, the Shift key is used when you want to type the punctuation mark located at the top of a punctuation key. In this lesson, you will learn how to type punctuation marks that do not involve the Shift key. Examples of these punctuation keys are the c...