The House of Lords is the upper house of the Parliament of the United Kingdom and its members are known as Lords Temporal and Lords Spiritual. The term 'SIRS' refers to the Knights of the Order of the Garter, who are members of the House of Lords. The term 'PEERAGE' refers to the title of nobility held by members of the House of Lords, such as Duke, Earl, Viscount, and Baron. The term 'PEERS' refers to all members of the House of Lords, regardless of their title or rank.