Computer architecture 1- I nput unit Input units are the hardware parts of a computer that can be used to enter data into the computer. They use input devices such as keyboards, mice, etc. for input and the computer via software. Or instruct it to be called I / O devices 2- Central unit The central unit processes the input data. For this purpose, both the central processing unit and the computing unit carry out an arithmetic calculation and a logical calculation and process the data. The CPU is called the brain of the computer. 3- Memory Memory is the part of a computer that stores user input and process data. It has two types of primary and second data, e.g. B. RAM and hard drive. 4- Output unit Based on the command you specified, you receive the processed information from the output computer that is received by your output device or output device. The best example of an Out device is your computer monitor. It's called I / O devices.