USB stands for Universal Serial Bus.

Explanation:
The Universal Serial Bus (USB) is a widely used hardware interface for connecting peripherals (such as keyboards, mice, printers, cameras, and external storage devices) to a computer. It was developed to standardize the connection and communication between different devices and computers.

Key Points:
- USB stands for Universal Serial Bus.
- It is a hardware interface used for connecting peripherals to a computer.
- USB was developed to standardize the connection and communication between different devices and computers.

Universal:
The term "universal" in USB refers to the fact that it is designed to work with a wide range of devices, regardless of the brand, model, or operating system they use. USB allows for easy plug-and-play functionality, where devices can be connected or disconnected without the need to restart the computer.

Serial:
The term "serial" in USB refers to the way data is transmitted between devices. Unlike parallel interfaces, which send multiple bits of data simultaneously through separate wires, USB uses a serial communication method. This means that data is sent one bit at a time over a single wire, allowing for simpler and more efficient communication.

Bus:
In the context of computer hardware, a "bus" refers to a communication pathway that allows multiple devices to connect to a central hub or controller. The USB bus serves as a common pathway for data transfer between the computer and connected devices. It provides power, data transfer, and control signals to the peripherals.

Advantages of USB:
- Universal compatibility: USB is compatible with a wide range of devices, making it a versatile and widely adopted standard.
- Plug-and-play functionality: USB devices can be easily connected or disconnected without the need to restart the computer.
- High data transfer rates: USB supports high-speed data transfer, allowing for fast and efficient communication between devices.
- Power supply: USB provides power to connected devices, eliminating the need for separate power adapters in many cases.
- Expandability: USB supports the use of hubs, which allow multiple devices to be connected to a single USB port.

Conclusion:
USB (Universal Serial Bus) is a widely used hardware interface that allows for easy connection and communication between devices and computers. It provides universal compatibility, high data transfer rates, and plug-and-play functionality, making it an essential part of modern computer systems.