The United States Statutes at Large, commonly referred to as the Statutes at Large and abbreviated Stat., are an official record of Acts of Congress and concurrent resolutions passed by the United States Congress. Each act and resolution of Congress is originally published as a slip law, which is classified as either public law (abbreviated Pub.L.) or private law (Pvt.L.), and designated and numbered accordingly. At the end of a Congressional session, the statutes enacted during that session are compiled into bound books, known as "session law" publications.