The abbreviation-symbols of the Romans, found in ancient uncial MSS., may be roughly divided into three classes:

(1) Those peculiar to juristic writing, e.g. R.P. ‘res priuata’ (any case), Q.D.R.A. ‘qua de re agitur.’ They are properly called ‘notae iuris.’ They abound in the famous Verona MS. of Gaius(uncial, ‘fifth century’).

(2) A few used in histories, etc., e.g. R.P. 'respublica' (any case), Q. ‘Quintus’ (any case). Valerius Probus, who compiled a manual of ancient Notae, calls this class ‘notae publicae’. They appear in such MSS. as the codex Puteanus of Livy (uncial, ‘fifth century’); and since they have been transferred into modern editions of the Latin historians, etc., no one is at a loss to interpret them nowadays, although they puzzled mediaeval scribes.

(3) Symbols of ordinary words of frequent occurrence in any type of literature, e.g. Q. ‘que.’ It is this class which is the subject of this article.