The term processor is used conversely with the term central processing unit ( CPU ), although the CPU is not the only processor in a computer. The GPU (graphics processing unit) is the most notable example of it. CENTRAL PROCESSING UNITS (CPU ) The ALU and control unit of a computer are combined into a single unit called the Central Processing Unit. The CPU is truly the "brain" of the computer because it combines the circuitry that generates all the control signals needed to execute an instruction with the circuitry that actually performs the operations called by the instructions. CPUs will perform most basic arithmetic, logic and I/O operations, as well as allocate commands for other chips and components running in computer. Processors can be found in PCs, smartphones, tablets and other devices. The two main competitors in the processor market are Intel and AMD. I/O Processors Some I/O devices can transmit a la...