USB (Universal Serial Bus) is a standard technology used to connect computers and electronic devices for communication and power supply. It was developed in the 1990s to simplify the connection between peripherals (like keyboards, mice, printers, external hard drives, etc.) and computers.

Key Points about USB:

• Full form: Universal Serial Bus

• Purpose: To transfer data and supply electrical power between devices.

• Common Uses: Charging smartphones, transferring files, connecting input devices (keyboard, mouse), connecting storage devices (pen drives, external hard drives), and more.

• Types of USB Connectors:

  • USB Type-A (the original rectangular plug)

  • USB Type-B (mostly used for printers)

  • USB Mini and Micro (used for mobile devices)

  • USB Type-C (newer, reversible connector used for fast data and power transfer)

• Versions of USB:

  • USB 1.0 (slow speed)

  • USB 2.0 (high speed)

  • USB 3.0 and 3.1 (super speed, faster data transfer)

  • USB 3.2 and USB4 (even faster, supporting more devices simultaneously)

• Features:

  • Plug and play (no need for rebooting)

  • Hot-swappable (you can connect or disconnect without turning off the device)

  • Supports multiple devices through USB hubs