A Bookkeeper records and keeps all the financial transactions or "books" of a business.
An Accounting System refers to the entire process of keeping track of all a business´ financial transactions and financial controls. Some basic elements of an accounting system include the Payables and Receivables systems, Inventory Tracking, Payroll, and Sales.
Accounting Controls allow a manager or business owner to keep track of and control a company's assets. A major control is the Inventory Control System which essentially tracks inventory levels, increases, and decreases so that a manager can determine what may need to be re-ordered or what is or is not selling well.