
 CPU stands for: central processing unit. The Central Processing Unit  is the portion of a computer  system that carries out the instructions of a computer program, and is the primary element carrying out  the functions of the computer or other processing device. The central  processing unit carries out each instruction  of the program in sequence, to perform the basic arithmetical, logical,  and input/output operations of the system. This term has been in use in  the computer industry at least since the early 1960s.[1]  The form, design and implementation of CPUs have changed dramatically  since the earliest examples, but their fundamental operation remains  much the same.
 


