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.
President Abraham Lincoln as Commander-in-Chief. President Abraham Lincoln, as commander-in-chief of the United States Armed Forces, with Allan Pinkerton and Major General John A. McClernand after the Battle of Antietam, 1862.