Adeptus Mechanicus - Magos: A Magos is a master of a technological or scientific discipline, having devoted many Terran years of service to the Omnissiah in that area of study. There are many specialist divisions within the Adeptus Mechanicus known as Divisiones.Magi from these are given a rank containing the specialisation of their Divisio, such as Magos Alchemys, Magos Biologis, Magos Technicus, Magos Logis, Magos Xenologis, Magos Lexmechanicus, Magos Orbologis, Magos Cybernetica, Magos Xenobiologis, Magos Astrologicus, Magos Digitalis, Magos Fabricator, Magos Genetus, Magos Physic, and possibly many more.There are two higher ranks within the Divisiones that are variations of the Magos, including Archmagos and Archmagos Veneratus. It is not known what the specific connotations of these titles are, though presumably they are indicative of greater seniority and experience.Magos Dominus: A Magos Dominus (fem: Magos Domina), known also as a Tech-priest Dominus, is a senior Tech-priest of the Adeptus Mechanicus who commands the Mechanicus' military forces and seek to advance military technology. The Magi of the Priesthood of Mars are the masters of much of what remains of the vast and potent military secrets of the Dark Age of Technology, particularly the ancient technology of combat robots, the Battle-Automata. To them the pursuit and preservation of the arcane mysteries of science and circuit are of far greater worth than petty wealth, worldly power or the lives of their fellow men. A Tech-priest Dominus may live for many standard centuries or even millennia, prolonging their life through arcane science and progressive cybernetic conversion, willingly becoming something other than human as they seek to fulfil the Omnissiah's will. The offices and titles of the Tech-priests are shifting and complex. Such is their authority that many senior Tech-priests adjust their ranks at will, in times of war adopting that of Tech-priest Dominus.Magos Explorator: Obsessed with the quest for knowledge, the senior Tech-priests who take on the mantle of a Magos Explorator search high and low across the galaxy for lost STC databases and ancient human scientific and technical knowledge lost during the Age of Strife. A breed apart from regular Tech-priests, any Explorator or member of his team will willingly walk into forgotten catacombs, even at the risk of death, for mere snippets of long-forgotten knowledge from the Dark Age of Technology. Many Magos Explorator command the Explorator fleets that continue to push outward the frontiers of the Imperium or even serve alongside Rogue Traders.Magos Errant: Something of a jack of all trades, a Magos Errant studies several scientific and engineering disciplines, including chemistry, genetics, metallurgy and more. They are then attached to Rogue Trader fleets and other similar Imperial expeditions by treaty between the Adeptus Mechanicus and the individual Rogue Trader houses or the Imperium itself if the expedition is sponsored by the Adeptus Administratum. In return for the Adeptus Mechanicus' expertise in technical maintenance and science, the Magos Errant is allowed to study interesting sites the expedition comes near, transport sensitive materials and generally make use of the expedition's resources for the greater good of the Machine God.Magos Juris: Magos Juris are those rare Tech-priests who choose to devote their minds to the study of the Machine God's will rather than the knowledge it embodies, removing themselves from the Quest for Knowledge in order to preserve it from the abuses of the heathen masses of Mankind. Amongst their colleagues on the Calixis Sector's Forge Worlds, these individuals are sometimes known as Magos Juris. They relentlessly pursue those who would commit tech-heresy or steal the secrets of the Adeptus Mechanicus. These Magos hunt down those who would employ unsanctioned technology or, even worse, operate technology without the blessing and oversight of the Adeptus Mechanicus. Magos Juris will go so far as to even take Mechanicus voidships into the depths of the Koronus Expanse to hunt down their foes. Worse still are those who smuggle technology, attempting to keep it from its rightful guardians. The fate of such men, when they are caught, is a grim one, for they are condemned to spend a far-expanded lifetime toiling without mind or will as a Servitor aboard the ship of the Magos that judged them, their minds obliterated and their bodies repurposed to serve the Machine God that they blasphemed against. There are many Explorator Tech-priests who speculate that the Magos Juris are, in fact, the agents of a secret order within the Adeptus Mechanicus known as the Lords Dragon. This ancient and powerful cabal is composed of specially-altered Archmagos said to exist deep within the secret inner circles of Mechanicus politics on the Calixian Forge Worlds known as the Lathes. Their task: to police the Mechanicus from within. However, little evidence can be found that proves the Lords Dragon exist at all, and that these Magos Juris do not simply operate on their own.