The U.S. federal government does not publish an official reporter for the federal courts at the circuit and district levels (the sole exception is the D.C. Circuit). However, just as the UK government uses the ICLR reporters by default, the U.S. courts use the unofficial West federal reporters for cases after 1880, which are the "Federal Reporter" (for courts of appeals) and the "Federal Supplement" (for district courts). For cases from federal circuit and district courts prior to 1880, U.S. courts use "Federal Cases". The "Federal Reporter", the "Federal Supplement", and "Federal Cases" are all part of the NRS and include headnotes marked with West key numbers. West's NRS also includes several unofficial state-specific reporters for large states like California. The NRS now numbers well over 10,000 volumes; therefore, only the largest law libraries maintain a full hard copy set in their on-site collections.