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.
Many of the most important decisions of the presidency have been made in wartime, in the president's role as commander-in-chief. As Commander-in-Chief of the United States' armed forces, the President is ultimately at the head of the chain of command for the Army, Navy, Air Force, Marines and the Coast Guard.