2. 1.The Keyboard
2.The Mouse
3.Joystick
4.The Scanner
5.Optical character reader (ocr)
6.Magnetic ink character reader (micr)
7.Light pen
8.Bar code reader
9.Microphone (mic)
10.Digital camera (digicam)

3. Advantages*
*reliable way of inputting text and numbers.
*available in variety of formats.
Disadvantages*
*not useful for entering some specific type of data (e.g..
pictures, diagrams, voice, video etc.
*very slow while

4. Advantages
*Ideal for pointing objectoptions on desktop computer
*Most familiar and easy to use pointing device.
Disadvantages
*need a f lat space close to computer.
*a mouse can’t easily be used with a laptop or a note book or a
palm top computer.

5. Advantages
*Easy to learn and use.
*not costly.
Disadvantages
*movement is offered only in forward, backward left and right
directions , so diagonal movements create problems at times.

6. Advantages
*It can copy things onto computers then you can alter the things
you copied.
*they are useful for capturing images and being stored in a
computer
Disadvantages
*images can take a lot of memory space
*scanners are not portable devices

7. Advantages
*It can be stored on a computer so is less likely to be lost.
*converted text is editable in word processors.
Disadvantages
*you need to buy a scanner and OCR software
*It is not completely accurate and text would need proof -
reading afterwards

8. Advantages
*Documents prepared for MICR are difficult to forge
*Documents can still be read after being folded or split etc.
Disadvantages
*MICR readers and encoders are expensive
*The system can only accept a few characters.

9. Advantages
*Easy to use
*Can directly draw on screen
Disadvantages
*Not very accurate while drawing
*Tiresome after long usage hours

10. Advantages
*Fast and reliable method of inputting data
*can even read from curved or upside down surfaces
Disadvantages
*Input is limited to a number code