Keyboard and mouse are important input devices of computer.

1. Keyboard

The keyboard usually consists of keys, circuit board, housing and other parts. Keys are labeled with letters, numbers, symbols, etc. By pressing different combinations of keys, various texts and commands can be entered.

By Category:

According to the keyboard layout can be divided into standard keyboard, ergonomic keyboard and so on. The standard keyboard has a more traditional key layout, while the ergonomic keyboard is designed to pay more attention to the user's comfort and reduce hand fatigue.

According to the connection mode, it can be divided into wired keyboard and wireless keyboard. The wired keyboard is connected with the computer through the cable, and the signal is stable; Wireless keyboards connect to computers via Bluetooth or other wireless technologies, making them more convenient and flexible to use.

Functions:

Input text: you can input letters, numbers, symbols, etc., is the most basic function.

Shortcut key operation: many keyboards are equipped with shortcut keys, such as copy, paste, screenshot, etc., can improve operation efficiency.

Multimedia control: Some keyboards also have multimedia control keys to adjust volume, play/pause music, etc.

2. Mouse

A mouse usually consists of a left button, a right button, a scroll wheel, and a sensor. By moving the mouse and clicking keys, you can control the cursor movement and perform various operations on the computer screen.

By Category:

According to the working principle can be divided into mechanical mouse and photoelectric mouse. A mechanical mouse senses movement through a ball at the bottom, while a photoelectric mouse senses movement through a photoelectric sensor at the bottom. The photoelectric mouse has gradually replaced the mechanical mouse because of its higher precision and sensitivity.

According to the connection mode can be divided into wired mouse and wireless mouse. Similar to the keyboard, the wired mouse signal is stable, and the wireless mouse is easy to use.

Functions:

Cursor control: can control the cursor movement on the computer screen, convenient selection and operation of objects.

Click operation: the left button is usually used to select and confirm, the right button is used to pop up the menu, the wheel can be used to scroll the page, etc.

Gesture operation: Some high-end mice support gesture operation, such as sliding, zozing, etc., which can be more convenient to operate.

In short, keyboard and mouse are indispensable input devices for computer users, and their performance and comfort directly affect the user experience. When choosing keyboard and mouse, you should choose according to your own needs and use habits.