INPUT DEVICES
1. Where does the name ‘QWERTY’ Keyboard come from?
From the first 6 letters on the top left of keyboards
2. Why do you think the QWERTY keyboard is the most popular method of data entry?
Because it is the first 6 keyboard alphabets
3. Who might make use of a concept keyboard?
People who find it hard to use keyboards
4. What are the benefits of using a concept keyboard?
It can be easier for young children and people can order quicker in restaurants.
5. Explain why a mouse often called a pointing device
Because it moves a cursor on a computer.
6. Describe the difference between a mouse and a tracker ball?
Mouse requires the whole hand to control, but the tracker ball only requires on finger.
7. Which type of input device would you choose if you were going to play a ‘shoot ‘em up’
computer game?
Joystick
8. Who is likely to use a Graphics Tablet and why?
Designers and illustrators, because they can draw on the computer straight away naturally.
9. Explain briefly how scanners work
It gives out a beam of light then reflects the colour back to the sensor to scan the surface.
10. Explain why automated input devices allow more accurate input of data than manual input
devices
They automatically fill up the spaces that have not been read by the input devices.
11. What do the initials MICR stands for?
Magnetic Ink Character Recognition
11.b Where are you most likely to come across this type of input device?
A well-written script or text
12. Explain how OMR is used to help mark test papers
Students fill the spaces up with computer pens and the OMRs read them to show the result.
13a. Why do Credit cards have a magnetic stripe on the back?
So that the magnetic stripe readers can identify the cards.
13b. What is used to read the information from the magnetic stripe?
Magnetic Stripe Reader
13c. What are some of the problems with this method of data storage?
The information can be deleted easily
14 a. What device is used to capture the barcodes on products?
Barcode Reader
14 b. Explain why the price isn’t stored on the barcode.
Because the price may always change depending on the currency and the economy
15. Which input device would you suggest for the following situations:
Writing a story for homework
Computer
Drawing a cartoon
Graphics Tablet
Checking your bank balance at the bank
Storing information on your Credit card
Changing the text from a page into digital
format so you can edit it.
Storing information on bank cheques.
Super computer
Magnetic Stripe Reader
Optical Character Recognition
Barcode Reader