1 Data registers can hold numeric values such as integer and, in some architectures, floating-point values, as well as characters, small bit arrays and other data. 2  In some older and low end CPUs, a special data register, known as the accumulator, is used implicitly for many operations.
A commander-in-chief is the person or body that exercises supreme operational command and control of a nation's military forces or significant elements of those forces. In the latter case, the force element is those forces within a particular region, or associated by function.
What is a Commander? In contrast to a lieutenant colonel in the Army, a Navy commander is usually the executive officer of a large vessel, such as an aircraft carrier. Commanders also may serve as captain of smaller boats like destroyers or frigates. This rank also exists in the U.S. Coast Guard and maritime service.