Numbers
Here you choose how to display numbers in your computer.
There is a pull down menu here as well where you can choose you region (for preset values).
You can also set your own values for decimal and thousands separators.
i.e.
Here (in the USA) we have a period ( . ) for decimals and the comma ( , ) for thousands so if we wanted to write
five thousand and ten hundreds we would write it as:
5,000.10
but
in some european countries it's the opposite, the period is used for the thousands and the comma for the decimals so in europe they would write it as:
5.000,10
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In this tab you can also set the symbol for the currency , as well as where it appears relativelly to the number.
For example:
In the USA we would write $10 while in canada (I think) they would write 10$...or another example: 10? (10 euros)
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Keyboards
The last tab in this pane is the keyboards tab.
This tab just has all the keyboard layouts available for someone to use.
To make one active just click right next to it and once you close the prefs panel you will see a little flag on your menu bar. Just click on it and you can switch between keyboard layouts.
A WORD OF CAUTION!!!!!
If you do not know about keyboard layouts and you are used to QWERTY keyboards, and you have never typed in any other language before (like chinese, japanese, greek and so on) its best to not mess with more keyboards.
It wont do anything bad to the computer, but it will probably confuse the heck outta you. The reason for this is that not everyont uses QWERTY keyboards (Standard american/english keayboard).
The french for example use an AZERTY keyboard layout and other countried use other keyboard layouts. This stems from the fact that keyboards are layed out like Typewriter keyboards, and each country hand its own way of laying out keys on a keyboard (depending on ergonomics, and frequency of key use, as well as different letters and accented letters).
So if you at some point press the 'q' key on your keyboard and you see an 'a' coming out on your screen, it probably means that you have changed keyboard layouts. If you've never deals with keyboard layouts before and arent gong to type in a non-roman language, its safe to ingore this tab.
If you know about keyboard layouts, then you have probably dealt with them in the past so no need to mention more
Hope this helped
Admiral