Where can you find Open Office and why should you use it?

Open Office Download

OpenOffice is an open source free office suite application that contains several programs like in the Microsoft Office package.

You can download the programm in several installer programs from: http://www.openoffice.org/

A real good book to learn more about Openoffice is The OpenOffice.org 2 Guidebook but this might be a bit to mucht to start with, so in that case you could try and use the OpenOffice.org for Dummies, but if you really want to work with a standard manual, The OpenOffice.org 2 Guidebook is the right one for you.