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.
As the commander-in-chief, the most crucial of all the presidential powers is the command of the United States Armed Forces. The president is responsible for the direction and disposition of the military. Through the Department of Defense and Department of State, he is also in charge of US foreign policy.