The second important component of a computer is the CPU also called central processor is the electronic circuitry within a computer that executes instructions that make up a computer program. The Computer system consists of mainly three types that are central processing unit CPU Input Devices and Output Devices. The Computer System Computer System What Is Computer Computer Basic The set of instructions is presented to the computer in the form of raw data which is entered through. . Our online basic computer trivia quizzes can be adapted to suit your requirements for taking some of the top basic computer quizzes. In conjunction with the bus width many computer professionals refer to a computers word size which is the number of bits the. The CPU performs basic arithmetic logic controlling and inputoutput operations specified by the instructions in the program. The central processing unit or CPU the primary memory input units