A comptroller or controller (or ; also financial controller, abrv. FC)'s a person who supervises accounting and financial reporting within an organization. A controller's an accountant in a business who oversees accounting and the implementation and monitoring of internal controls. In the United States, the United Kingdom, and Canada, a controller or financial controller's a senior position within most companies. Etymology The term comptroller evolved in the 15th century through a blend of the M… (More on Comptroller)