what are the basic components of a computer system?illustrate your answer with simplified diagram.

what are the basic components of a computer system?illustrate your answer with simplified diagram.

                            COMPUTER SYSTEM a computer system consists of a computer and supporting devices for input and output of data. th... 08:58

                           COMPUTER SYSTEM
a computer system consists of a computer and supporting devices for input and output of data. the basic organisation of any computer system shown diagram given blow:
                                             central processing unit (CPU)
                                               
                                                          memory unit
                                                              (store)

                input device                 control unit                       output devices
                 (terminal)                        (brain)                                   (printer)


                                                    arithmetic and logic
                                                           unit (ALU)
                                                           (operator)
the input device, the central processing unit and the output device together constitute the computer system. the various functions performed by these unit are stated below:
1    INPUT DEVICE. these are the device through which data are programmers or necessary information can be fed into the computer. more commonly used input device are key board, punched cards, paper tapes, magnetic tapes, magnetic dicks, floppy dicks, remote terminal and scanners etc. remote terminal is the most popular mode tease days. it has a keyboard wired to computer and screen.
2    CENTRAL PROCESSING Unit (CPU). this is the most important unit of the computer system. it is thus rightly called the heart of the computer system. it is this unit which performed all arithmetic and logical processing. the central processing unit is further divided into three unit:
                          (1)   memory unit
                          (2)   arithmetical/logic unit
                          (3)   control unit
(1)   Memory unit.  one of the characteristics of computer is storage. this unit store all the data and instructions which are needed at the time of processing. memory located inside the computer is the internal memory which is also called primary memory. it is the place where the data can be stored. there are several types of devices such as magnetic drums, disks, types and cores used for the  internal storage unit. the capacity  of primary storage of most computers is limited therefore, external storage is required for holding data not currently is use. external memory is also known as secondary memory.
(2)   Arithmetic logic unit (ALU). its unit consists of complicated electronic circuits. it performs the required calculations at high speed and takes all the logical decisions. the arithmetic unit is able to carry out all the ordinary operations of additions, subtractions, multiplications are division with the data supplied to the input unit and stored in storage unit. the arithmetic unit unit can perform a long sequence of operations without human interference according to the instruction issued by the control unit.
(3)   CONTROL UNIT. this unit directs the computer what to do and the sequence

in which it should be done. thus, it is the directing brain of the computer. this unit controls and co-ordinates the activities of all other units, such as ALU. memory unit, input unit and output unit. as per the programmer it calls for data from the storage devices, processes it and returns it to storage calls and if needed of the output  device to print out the results.
3.     OUTPUT device. output devices are used to record the results obtained by the computer and present them to the user. some of the common output devices are visual display unit, printers, card punching machines, magnetic tape drives, magnetic disk drive, floppy disk drive, graph plotters etc.