A processor is an electronic circuit that carries out arithmetic and logic operations. The term microprocessor comes from the fact that the components are not distinct devices but are all incorporated in single integrated circuit. The processor can be imagined as the nerve centre of the computer. The main processors used in PCs are the Intel Pentium and the AMD Athlon.
Derived terms: biprocessor, computer with two central processors, triprocessor, computer with three central processors; multiprocessor, computer with several central processors.