The word "Order" as used in the Prayer Book means regulation or ordinance, according to its derivation from the Latin word ordo. This is seen in the title of the Communion Office which reads, "The Order for the Administration of the Lord's Supper, or Holy Communion," i.e., the prescribed way in which the Holy Communion shall be celebrated. So, also, of all other services; the Prayer Book sets forth the order or manner in which they shall be ministered, and such they are called.