Use alt keys in your LIFE

Using alternative keys in keyboard is a good habit . you can use it by the time your keyboard is not working and you want a special keys to your documents.
  why not using in your acct password .. sound good idea ,let you try so hackers is get hard to steal your password . but using alt keys is not universal in all Operating system. alt keys is use only and enhance in windows world. is not work correctly in linux and apple mac..

Windows

In Microsoft Windows, holding down the Alt key while typing in numbers (often referred to as Alt codes) on the numeric keypad allows the user to type special characters not normally available on the keyboard. For example, holding down Alt while typing 0225 (Alt+0225) on the numeric keypad will result in á, the character at 225 in the codepage. These extended keyboard characters are useful for persons using foreign languages, mathematics, currency symbols, business use, etc. It is important to make sure the Num Lock key is on.

Mac OS X

On a Macintosh, the Alt key is called the Option key. It is not used to enter numeric character codes. Instead, keyboard letters and numbers are used. The diagram below shows the special characters a US Mac keyboard will produce when the Option key is pressed.^[1]

The highlighted orange keys show the accents available from the combination of the Alt key and the keyboard characters e ` i n u. The accent then can be applied to associated letters both lower and uppercase. The additional characters a Mac will produce are a combination of both the Option key and the ⇧ Shift key pressed down together. With this combination pressed the keyboard will now produce a different set or an uppercase version of the previous set in some cases.

alt key in mac

http://en.wikipedia.org/wiki/Alt_key

SO USE ALTERNATIVE WAY ..