Texas Instruments TI-89 Titanium Graphing Calculator

Hi all,
can anyone tell me anything about the Ti 89 titanium? I'm in the market for a new calculator for an engineering course.
Does anyone know if this calculator actually shows the person using it how they got to the answer, or does it just show the answer.

Thanks

Almost no TI calculator shows how to get the answer, just the answer it self.
You might be able download programs for it to show what you need.

ticalc.org