So I got my Nspire handheld CAS with Touchpad

It is taking a bit exploring and quite a bit of reading to get used to. I am not ready to take it to a calculus or physics test just yet, but I could.

The manual that came with it is lacking in there are some features that are not explained in detail.

QUESTION:

On/in the lower left side of the keyboard are three white buttons adjacent to the black alpha buttons... [EE] a [Pi] and a [,]
I can't for the life of me find the use for the EE (or, if it is scientific notation, how to use it)

Please advise...
Cheers!

I am an idiot, I should have asked Google before showing my ignorance here before the forum.

It is the sciFi button...
ADMIN, please delete this post!

Live some study some, learn....