Write short notes on.
1. Input
2. Storage
3. Output
Answers
Explanation:
There are three different types of peripherals: Input, used to interact with, or send data to the computer (mouse, keyboards, etc.) Output, which provides output to the user from the computer (monitors, printers, etc.) Storage, which stores data processed by the computer (hard drives, flash drives, etc.)
Explanation:
Input devices
Input devices take data from the 'outside world' (i.e. outside of the computer) and send it to the Central Processing Unit for processing. Data can be collected and entered into a computer in a range of ways. These include, for example, a keyboard, a mouse, a graphics tablet, a touch screen, a bar code reader, a magnetic stripe reader and so on. So data from the world outside of the computer is entered into the computer system using ‘input devices’.
Output devices
Every computer system will need to have a way of displaying information or printing information out so that it is useful to humans. There needs to be, therefore, some ‘output devices’. A very useful output device is a VDU (or Visual Display Unit). Another handy one that allows you to produce ‘hardcopy’ (i.e. a printout on paper) is a printer. It is possible that you also need an audio output. Speakers or headphones would be useful in these circumstances!
Storage devices
Of course, the computer might not want to display or print out the results of some processing immediately. It might simply want to store the results for another time. It therefore needs some storage devices. Storage devices will store data, even when the power to the computer is switched off. When the power is switched on again, the data can be retrieved. For this reason, storage devices are known as ‘non-volatile’ devices. Examples include USB pen drives, hard disks, CDs, CD R/Ws, DVDs, SD and micro SD cards, Blu-ray disks and magnetic tape. The hard drive is a very important storage device in your computer that deserves a special mention at this point in time. Not only does it hold all of your files, even when the power is switched off, it also holds your operating system and all of the programs you want to use, too.