Accounts Department. n. department that administers a company’s financial affairs
A.G.M. (BrE) Annual General Meeting 
Board of directors n. a group of people selected to establish policy for a company
Chairman (BrE) n. person  heading a Board of Directors; head of a company; chairperson
Director n. a member of the board of directors
Executive officer (AmE) n. person responsible for managing the affairs of a corporation – Chief Executive Officer n.
Headquarters n. a company’s principal or main office or centre of control
Manager n. person responsible for day-to-day running of a department.; executive officer (AmE)
Managing director (BrE) n. senior director after the chairman responsible for day-to-day direction
Marketing Department. n. department responsible for launching goods on the market, packaging, advertising, etc.
Organisation chart n. a plan or table showing a company’s structure graphically
Personnel Dept. n. department responsible for the recruitment and welfare of staff or employees
President (AmE) n. the highest executive officer of a company; head of a company
Production Dept. n. department responsible for the physical creation of products
Purchasing Dept. n. department responsible for buying everything needed by a company
R & D Dept n. department responsible for Research and Development 
Reception n. the place where visitors and clients report on arrival at a company
Sales Department n. department responsible for finding customers and making sales
Shareholder n. person who holds or owns shares in a company or corporation
Vice president (AmE) n. an executive officer responsible for a separate division