This is one of the abbreviations that precedes a Congressional bill number. The Government Publishing Office, formerly the Government Printing Office, is responsible for printing all legislative materials. The abbreviations are as follows: House Bill (H.R.), Senate Bill (S.), House Joint Resolution (H.J. Res.), Senate joint Resolution (S.J.Res.), House Concurrent Resolution (H.Con.Res.), Senate Concurrent Resolution (S.Con.Res.), House Simple Resolution (H.Res.), Senate Simple Resolution (S.Res.). The GPO provides extensive definitions for these various types of legislation. – The Government Publishing Office