BG stands for business group and BU stands for business unit.
BU stands for Business Unit. BU does not represent a specific subsidiary or branch company. For a multi-business group company,BU is a collection of a certain type of business, which may exist in the form of a division or independent subsidiary, or may not form a division, but is managed as a separate business.
BG is an abbreviation of the English word business group, usually used within enterprises, generally translated as \"business group\