Charlie, I am just beginning to learn about genealogy searches. So, I am not an expert. However, I thought you might find the National Archives site interesting. It has info about the soundex machine. The address is: www.nara.gov You can search the Dawes Rolls, the Guion Miller Rolls and others. I found the indexes easiest to find surnames. Melinda Charlie wrote: Was soundex census information first begun in 1890? Was it carried through up to and including 1920? Is it true that only families with children under 10 years of age were included on the Soundex cards? Are there Soundex microfilms for all states? Thanks!! Charlie