They are also known as peripheral devices 2 an input

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Unformatted text preview: tter and better devices. A few examples of efforts made in this direction are (there may be hundreds of such examples): 1. Originally, the keyboard of a computer was attached to its monitor. But today, nearly every terminal has a separate keyboard attached to the monitor with a reasonably long cable so that the user can move the keyboard to any comfortable position on the table or can even place it on his/her lap during operation. 2. Many new keyboards are designed with tilt adjustments and with hand-rest pads to make their use more comfortable for the operators. 3. Cordless mouse allows more comfortable operation of mouse device as compared to wired mouse. 4. Originally, monitors used to be fixed at one angle. But today, almost all monitors are mounted on a ball bearing and can be tilted and rotated to suit the height and angle of operation of an operator. 5. Monitors with curved screens are being replaced with those having flat screens to improve readability and reduce reflections. 6. Monochrome monitors are being replaced with color monitors because they are more comfortable to view. Many operators prefer them and report fewer instances of eye fatigue and blurred vision. 7. Newer monitors use higher resolution to prevent flicker of displayed objects, which may lead to eye problems. 8. Newer monitors also use special screen coatings for reducing glare on eyes. Points to Remember 1. The input-output devices (abbreviated I/O devices) provide the means of communication between the computer and the outer world. They are also known as peripheral devices. 2. An input device is an electromechanical device that accepts data from the outside world and translates them into a form the computer can interpret. 3. An output device is an electromechanical device that accepts data from a computer and translates them into a form suitable for use by the outside world (the users).260 m Foundations of Computing 4. Keyboard devices are the most commonly used input devices today. They allow data entry into a computer system by pressing a set of keys (labeled buttons), whi...
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This document was uploaded on 04/07/2014.

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