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 management concept which separates companies within the same industry with similar business models and or a similar strategy combination. A strategic group can be from any type of business and depending on the industry, are defined within a dimensional construct.