You're welcome Barbara. Glad to help.
IGI = International Genealogical Index and is the index to the data collected by the Mormon Church. They have filmed and indexed thousands of parish registers etc from around the world and made it available to all. You get to FamilySearch here: http://www.familysearch.org/. It is always meant to be a guide to finding people and the sources should always be checked. But it's a wonderful source of information none the less if you allow for the fact that it has errors and interpretations and does not have "everybody who every lived".