General epistles
Beuron Institute allocated numbers up to 100 to all existing Old Latin manuscripts, depending on what parts of NT they include, and how old their text is. The lowest numbers are allocated to the gospels, and to the most complete manuscripts. For example, Codex Bezae (d) is a witness for the Gospels (Gosp), the Book of Acts and the General epistles (Gen), and is allocated number 5.