agentes vices
Officials of the Roman and of the Early Byzantine Empire. They had administrative responsibilities being in the service of the praetorian prefects.

comes
1. A title in the Roman and the Byzantine Empires, designating an official with political but mostly military jurisdiction. Especially the comes Orientis held the position corresponding to that of a vicar in Early Byzantine period. In the years of Justinian I, the comes in head of wider provinces assumed political and military powers, while in the Middle Byzantine period the Opsikion theme was one of the few themes which was the jurisdiction of a comes instead of a strategos.2. A nobility title in medieval Europe.

emporion, the
Places where trade was conducted, usually small settlements of urban character on the borders or along the coasts and the commercial routes. With the same term are characterized the trade districts, the markets outside the walls of a city and/or settlements being themselves trade centers.

novel (novella)
Τerm meaning ad verbum "new decree" and used since around the 4th century in order to denote the provisions of the emperors as separate from the organized codes. They were written mainly in Greek and used extensively in the Middle Byzantine Era. Since the days of Komnenoi and after, they were replaced by other more specialized terms and they are very rare in the Late Byzantine era

praetorian prefect (praefectus praetorio)
Commander of the emperor's bodyguard under the principate. During the regne of Constantine I the praetorian prefect becomes a dignitary responsible for the administrative unit called the prefecture, which was subdivided into dioceses. In 400 A.D. there were four such praetorian prefectures, of Oriens, of Illyricum, of Illyricum, Italia and Africa and of Gallia. The praetorian prefects were second only to the emperor. The praetorian prefect of Oriens was the mightiest among prefects. His office is for the last time mentioned in 680.

praetorian prefecture (praefecura praitorio)
In Late Roman Empire it was the basic administrative unit. Prefectures were estabished by Constantine I (4th century). The Empire was then divided to four praetorian prefectures: i) praefectura praetorio per Orientem (prefecture of Oriens), ii) praefectura praetorio Galliarum (prefecture of Galliae), iii) praefectura praetorio per Illyricum (prefecture of Illyricum), iv) praefectura praetorio Italiae, Illyrici et Africae (prefecture of Italia and Africa).

proconsul, -lis
A quite high ranking official, vir spectabilis according to the rank of the senate, who was inequable only to the Domestikos of the Scholae and to the Magister Militum per Orientem. The proconsul usually served as a governor of the Imperial provinces (i.e. in Asia Minor the provinces of Asia and Cappadocia). The office was demoted from the 9th century onwards and the term was in use until the 12th century meaning a dignity.

quaestor iustinianus exercitus
High ranking political and military official. The office of quaestura iustiniana exercitus was created by Justinian I (Nov. 51) with authority over the two frontier provinces of Moesia Secunda and Scythia Minor, as well as the provinces of the Islands, Caria and Cyprus. Probably the reform aims to ensure the enforcement of the frontier forces. However shortly the responsibilities of the quaestor exercitus were limited.

vicarius
Τhe term refers to the substitute of various officials. Since the 3rd century, the vicarius replaced mostly procuratores from the equestrian class. The most important vicarii were those who replaced the Praetorian eparchs in the dioceses set up by Diocletian. In addition, the vicarii could have military (like the command of the garrison in Egypt) or even judicial responsibilities.