What makes a computer

For a programmer who is not a computer professional, there are a lot of things to learn and never understand the composition and Principles of the computer. Today, let's look at the encyclopedia and learn a little bit about it, so that we can consolidate it in the future:

1. A computer is composed of a hardware system and a software system.

Hardware System:

Power supply is an indispensable power supply device in the computer. Its function is to convert v ac power to 5 v dc power used in the computer. It is also indispensable for all electronic products.

The main board is a platform for various components in the computer to work. It closely links all components of the computer and transmits data through the main board. Important "transportation hubs" in computers are
On the Main Board, the stability of its work affects the stability of the entire machine. Some people compare it to the foundation of a building, and decide whether the building is sturdy and durable.

CPU is also called a central processor. It is the computing core and control core of a computer. Just like a human brain, the CPU consists of the memory, controller, register, and high-speed cache.
Connection data, control, and status bus composition, CPU has become the core component that determines the computer performance


Memory, also known as internal memory or random memory (RAM), is divided into two types: DDR memory and SDRAM memory. Because sdram's capacity is low, the storage speed is slow, and the stability is poor, it has been replaced by DDR memory.
Memory is an electronic storage device, which consists of a circuit board and a chip. It features a small size, fast speed, power-saving, and zero-power clearing. When the computer is started, the memory can store data.
All the data is automatically cleared. The memory has DDR DDR2 ddr3 and the capacity is divided into 1-64 GB.


The hard disk is an external storage, and the mechanical hard disk is made of metal magnetic disk, and the magnetic disk has the memory function, so the data stored on the magnetic disk will not be lost whether it is started or shut down.

The sound card is an indispensable Hardware Device for multimedia. It converts the computer's voice digital signal into a analog signal and sends it to the speaker for sound.

The function of a video card is to output graphics and text on the display and convert the display information required by the computer system. The quality of a video card determines the performance of a computer.

Nic is a network that works on the data link layer. I think it determines whether our computer can connect to the network.

Modem
Commonly known as: cat, his role is to convert the digital signals processed on the computer into analog signals transmitted over the phone, most of which use external

Optical Drive
Computer used to read and write Cd content

Display
The computer processing result is displayed, that is, the interface we see
Keyboard and mouse
To make it easier for us to operate the computer, we can enter text or numbers.

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Software System:
1. System Software
Operating System
An operating system is a program system that manages, controls, and supervises the coordinated operation of computer software and hardware resources.

2. Language Processing System (translation program)

Mainly used for programming