The Sirius Corporation has a great many subsidiaries, but its main business centres around fusion reactors of all sorts - it makes and sells hyperdrive fuels, hyperdrives, power plants large and small, luxury surface transports, waste processing reactors, atmospheric processing units, industrial facilities for smelting, refining, and a wide range of mining equipment. It has cemented its position by using standardised parts for its power plants - whether it is at the heart of an industrial smelter, a luxury highliner or a surface city.

The Sirius Corporation now runs several dozen systems. These have a stricht legal system, their own penal code (based on Federal law), and their own law enforcement. They even have their own navy. Tourist Beacon 0206