The ACLU was involved in excess of 1,190 cases in the US Supreme Court as a party, counsel of record/ACLU attorney, or as the filer of an amicus (friend of the court) brief, during ninety-four of its first one hundred years, ending in January 19, 2020. This handbook summarizes all the facts and statistics from its companion three-volume set of over 1,190 cases (from June 8, 1925, Gitlow v. New York), and contains three examples of the cases found in the three-volume set.