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Data Input 01
The most common input device is a 'QWERTY' keyboard.

Data Input 01

As a KS3 ICT student, you will know that before you can process data you need to get the data into the computer. There are various devices for this purpose. Input devices are examples of hardware e.g. scanners and microphones. Some input devices like a keyboard or touch screen are manual but others, such as sensors, are automatic. A keyboard in some form is a common input device since most data that needs to be entered are letters, symbols and numbers. Anyone who has used a desktop computer will also be familiar with the mouse.

Early mice for computers looked very different to how they do today. They were not designed with ergonomics (ease and comfort of use) in mind. The mouse only really became common in the mid 1980s and may become out of date, replaced by touchscreens. The development of the mouse made using a computer easier, instead of needing to use a joystick or keys on the keyboard, just moving the mouse around and clicking had the same effect. Drawing images on a computer has been made a lot easier with the development of a graphics pad (tablet). This uses a stylus which is just like an artist using a pen, pencil or brush on paper.

Input devices are .......
Hardware is the word used to describe any of the physical parts of a computer system
An input device can be classed as .......
manual or automatic
semi-automatic or fully electronic
manual or hydraulic
none of the above
Examples of automatic input devices are a magnetic stripe reader and optical mark readers. You may think these are manual as a person needs to move the magnetic stripe or the sheet of paper but they are not - the device inputs the data to the computer, not the person holding the magnetic stripe or paper
The most common input device is a .......
concept keyboard
GKOS keyboard
MIDI keyboard
QWERTY keyboard
The QWERTY keyboard layout was developed during the 1870s when mechanical typewriters were first made
Which is not a computer input device?
Barcode reader
Flatbed scanner
Laser printer
A printer is an output device
QWERTY keyboards are so called because .......
it is the order of the keys on the first row of letters
it had to be called something
QWERTY means typewriter in Spanish
they were named after James Qwerty their designer
This was the best way to avoid the keys of a mechanical typewriter sticking together when they were pressed quickly. There is no reason why QWERTY keyboards should be used for computers other than people are used to them
Touch screens are used for input at cash machines .......
because they are cheaper than keyboards/keypads
because they are faster to process data
because they are harder to reprogram than keyboards
because they are more robust than keyboards
They don't contain moving parts
Concept keyboards are used in restaurants because .......
each key has a word or easily recognisable picture
it doesn't matter if drinks get spilled on them
they can add the price of a whole meal without mistakes
they need little staff training to use efficiently
The pictures on the keys make them quick and easy to use
A mouse has movement sensors. These sensors .......
calculate where the cursor is on the screen
measure the movement of the mouse in two directions
detect the movement of the mouse over the surface it is on
work out the direction and distance the mouse has moved
Software in the computer converts the signals from the mouse into movements of the cursor on the screen
Photographers often edit their digital pictures .......
using a Graphics table
using a Photo tablet
with a Graphics lozenge
with a Graphics tablet
Some have a display so you can see the image develop under the stylus. Others are linked to a separate screen
Editing digital photos on a Graphics pad .......
gives better quality results than a mouse
is easier and more accurate than using a mouse
is hard - Graphics pads are only used for CAD work
is more efficient than using a joystick
Graphics pad and graphics tablet mean the same
You can find more about this topic by visiting BBC Bitesize - Data and databases

Author:  Duncan Daish

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