Tab Key Useless?

[zack2o]

I see the keyboard has a key that represents a TAB key and i was wondering whether this was functional or maybe I'm having a problem with that key. Its the ALT function of the 'A' key. Any ides what it can be used for?
Thanks,
~zack~

 

[zack2o]

bump

bump ....

 

[Droid73]

its for numbers and symbols..