The Master Chief's backstory is never explained in the games. A prequel of Halo: Combat Evolved, the 2001 novel The Fall of Reach, reveals much of the character's history and was released as a companion to the game.
Definition. A group of companies is an economic entity formed of a set of companies which are either companies controlled by the same company, or the controlling company itself.Controlling a company means having the power to appoint the majority of its directors.e define: - the restricted contour, or core, of the group as all the companies more than 50% owned, directly or indirectly, by a parent company heading the group; the parent company is not more than 50% owned either directly or indirectly by another company. In this definition, groups form pairwise disjoint sets;
A commonwealth company is a Corporations Act company that the Commonwealth (the legal entity of Australia) controls. For more information, see the Commonwealth Authorities and Companies Act 1997, Section 34 (CAC Act). Chart of 87 bodies operating under the CAC Act (pg 2).