If you are referring to serving as a juror: There are really only two types of courts - Criminal court (both Misdemeanor trials and Felony Trials) and Civil Court and potential jurors are chosen from the same pool.
There are thousands, depending upon how you classify them. The simplest division is Igneous/Plutonic, Sedimentary, and Metamorphic. Beyond this you may classify them as carbonates, sulphates and so...
There is one type of autism. However, there are multiple types of pervasive developmental disorders, of which autism is one.
The pervasive developmental disorders, also known as autism spectrum...