Hardware

                                                    
                                                             Processor


A central processing unit  also referred to as a central processor unit,  is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. The form, design, and implementation of CPUs have changed over the course of their history, but their fundamental operation remains much the same.



                                                   
                                                         Memory



Main memory is the storage that is directly available to the CPU of a computer and is made3 up of RAM and ROM. RAM's (Random Access Memory) purpose is to hold the data and instructions temporarily which the CPU will process. ROM's (Read Only Memory) function is to hold data necessary for starting up the computer permanently , whose contents cannot be changed by the user.