Name that program, please help???

[GS!]

So my memory got erased and I have no clue what this program i had on my Ti 89 was called.

Someone mentioned "second screen" but I'm having no luck.

So I figured id ask.

You would enter the program by hitting diamond 2, then you would have to use f1 instead of enter to have the program process whatever was entered.

It was really handy for setting up derivitives and integrals, and super fast at entering a matrix too.

I want it back before my calc 3 exam, it saves a lot of time,please help!

Thank you
GS