(2) 1931 The computer system consists of four parte) An hiss that put and output device can do processing, but carunot store data of its dwn 1951 The user acesses the mainframe computer via 1961 is a set of instructions that tells the computer about the cases to be performed and how these tisks are to be performed 1971 controls, coordinates and supervises the operations of the computer 1981 unit stores the data instructions, intermediate results and output temporarily during the processing of data 1991 ore multi-user, multi-programming and high-performance computers 11001 consists of the mechanical parts that make up the computer as a machine. The hardware consists of physical devices of the computer [101 performs arithmetic and logic operations organizes the processing of data and instructions. It acts as a supervisor and antrols and coordinates the activity of other units of computer 11821 The compater system hardware comprises main components 1103] The functions of the Central Processing Unit are 11041 Is the mastermind of the computer one of the most important input devices which used to enter data and characters TOS) ALU is (106) are high-speed storage areas within the CPU, but have the least storage capaci 1187). Characters and symbols are represented as groups that consist of Bits [TOS) a very high speed memory placed in between RAM and CPU [109 is volatile. It stores data when the computer is on. The information stored in RAM gets etused when the computer is turned off 10101 sieres data and tastractics cherung the execution of instructions is a non-volatile primary memory 11121 und are the main memory 11131 Dute and program instructions are temporarily held in while the processor is using them 11141 is a optical disk that can only be read and not writtca onIt has high-storage (1151 is an example of sequential assess device. 1116) disks are direct access devices 117 Are usually fixed inside the computer esse or as external devices [118]. provides basic functionality to the computer, controls computer hardware, and acts as an interface between user and computer hardware 1179) include a set of commands that the user follows to write a program 11201 is a set of instructions, written in a language understood by the computer to perform a specific task 1211 Ar MS window is ma exmple of [122] are programs which users can make use of their practical life such as Microsoft office 11231 Asanterconnection of Two or more computers that are able to exchange information 10