How to write at sign (@) on different types of computers?

In Latin America in most computers only we need to put Ctrl + Alt and then pressed the number key 2, or Alt + 64 to 64 we key on the keypad (only numeric keypad).

For computers in other countries, we press the Ctrl + Alt + Q keys if not catch so we have to try Ctrl + Alt Gr + Q (the other alt located on the right side of the other,

If netbook press the two previous options or Shift + 2 but only nothing more.

In nothing to remove the N Hp netbook you type the (normal Alt or AltGr + n) keys or compaq US the key is next to the L nothing else ñ so no this work.

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