The Breviary contains all the hours of worship throughout the day, known as the Office: Matins, Lauds, Prime, Terce, Sext, None, Vespers, and Compline.
There are currently three versions of the Office on this site. The Latin edition represents the original liturgy. The two English editions adapt the text and music to the English language.
The Front Matter contains an introduction as well as a table of contents and the Kalendar. The common parts of the Office, used on a daily or weekly basis, are found in the Psalter. The proper parts pertaining to the weeks and seasons of the year are found in the Temporale. The proper parts pertaining to saints days and special feasts are found in the Sanctorale.
The Office is a highly complex but incredibly rich system of daily prayer. See Using the Sarum Rite today for suggestions on how to approach the material.