Eucharist
The ordinary of the Eucharist is sometimes known as the Order of Mass (Latin: Ordo Missae). In the Roman Missal, the Order of Mass is printed as a distinct section placed in the middle of the book, between the Mass of the Easter Vigil and that of Easter Sunday in pre-1970 editions, and between the Proper of the Seasons and the Proper of the Saints thereafter.
Much of the ordinary of the Eucharist is common to Western liturgical Christian denominations, but quite different from that of Eastern Christianity.
Read more about this topic: Ordinary (liturgy)