The U.S. Probation and Pretrial Services System, also called the Office of Probation and Pretrial Services, part of the Administrative Office of the United States Courts, is the probation office of the federal judiciary of the United States. It serves the United States district courts in all 94 federal judicial districts nationwide and constitutes the community corrections arm of the Federal Judiciary. It administers probation and supervised release under United States federal law enforced by probation officers.