If you are new to the concept of machine-generated autographs you should read my introduction to "Identifying Autopens" in the menu on the left. The rest of the guide should hopefully be useful for those of you that want to know how to spot Autopens.
The middle menu on the left gives known Autopen patterns and example signatures for most NASA astronauts from Groups 1 through 7. This reference guide allows you to compare signatures you find with these known patterns.
Finally, the lower menu on the left provides some examples of known pre-printed group and crew signed pieces.
Feedback and input are always welcome. If you have a nicer example of an autopen pattern than the ones I include here, or you have a pattern that I haven't included, please send me a scan!