Essay On CPU

CPU is the central processing unit, we also can all it processor. CPU is like the brain of a computer. The computer's CPU contains a logic circuitry that can handle or carry out all the instructions of a computer program. There are two components in CPU; the primary components of CPU are control unit (CU) and arithmetic logic unit (ALU). The control unit is use to interprets the instructions from software and hardware running to the computer and directs all the operations of processors. The arithmetic logic unit is use to perform the logical and arithmetical processing, and also the decision operations. CPU has four main functions, fetch, decode, execute, and store. In the first step of instruction cycle, the CPU wills taking the instruction

Input devices are very important for computer system. Without input devices there have no any data and information can enter to the computer, the computer will become useless. There can input many types of information to the computer, such as videos, images, audios and the others by using difference types of input devices. Input devices transform the user's actions and data such as graphics, sound and pictures into the digital data that can be read by computer. The two most common input devices that are operated directly were the mouse and keyboard. A keystroke contains keys for numbers and letters for their specialized task, such as PgUp, Ctrl, and Shift. Sometimes user need to press more than one key for some functions. For example, as a user you need to get a capital letter P then you need to press the shift key and P key at the same time, like Shift+P it function also same like Caps Lock. If you want to copy some words you can press Ctrl+C. Next input device is the mouse. The mouse was developed as a pointing device when start to use graphical user interface (GUI). This input device was important for user to interact with computer by manipulate on monitor screen objects such as folders and files. It follows the user fingers motions to