By far, the most common method of entering
data is by means of the Often
called the QWERTY keyboard because these are the first six character
keys on the top left (have a look at yours).
A
keyboard consists of rows of electronic switches ('keys') encased
in a plastic surround. Each switch has a graphic on it that describes
its function e.g. the switch with the letter 'B' on it will input
the 'B' character into the computer. To input data, you need to depress
the key. Key strokes are also combined to modify the input e.g. Holding
the Shift key at the same time as depressing the 'A' key will cause
a capital 'A' to be input rather than a lower case 'a'.
Along-side the usual letters and special
characters such as :@~()!"$%
etc, there are a set if 'F' keys along the top that can be assigned
special functions by the software you are running. For example F1
often brings up a help screen (but not always!).
- The most efficient way of entering
numbers, text and commands into the computer, as each key
has a specific function.
- Inexpensive, as virtually every computer
needs one.
|
|
- You have to learn to type!
- There are 'arrow keys' but they are
not as good as a mouse for controlling the screen cursor.
- May cause sore wrists and arms
|
 |
An 'ergonomic' keyboard that is designed to reduce
repetitive strain injury - your hands fit in the moulding and
so your wrist do not have to move so much. You use key combinations
to type letters and characters. |
|
| |
|
|
| Another type of ergonomic keyboard that seeks to be more comfortable
than the standard keyboard. |
 |
|
| |
|
|
Adapted keyboards for physical disabilities
|
A keyguard is a plate that
fits over the keyboard with holes positioned over the keys.
Pupils with physical disabilities can then rest their hands
on the keyguard and press the keys through the holes. This
prevents accidental keystrokes. The keyguards are steel with
a wipeclean surface and are held in place with Dual Lock
so they can be removed easily. Because of the huge range
of keyboards on the market, keyguards are available in combination
with a matching keyboard to ensure a perfect fit.
by Maxess
|
|
|
