What is the function of a universal serial bus (USB) on a laptop or desktop computer?

The function of a universal serial bus (USB) is primarily to allow the computer to connect peripheral devices. USB ports facilitate communication between the computer and external peripherals, such as keyboards, mice, printers, external hard drives, and other devices. This capability enables users to easily plug and unplug devices without the need for restarting the computer. Additionally, USB supports a method of data transfer that is both simple and efficient, making it a widely used standard for connecting various hardware components to computers.

The versatility of USB also extends to power supply, allowing devices to draw power directly from the computer, which further enhances its utility in modern computing environments. This aligns with the recognition of USB as an essential interface in the functionality and connectivity of laptops and desktop computers, enabling expanded capabilities and flexibility in device usage.