USB (Universal Serial Bus) allows electronic devices to connect to computers. It was created in 1995 to replace serial and parallel ports. There have been several versions with higher data transfer rates, from 1.5 Mbps in USB 1.0 to 5 Gbps in USB 3.0. USB hubs provide additional ports to connect multiple devices to a single computer port. Common USB devices include keyboards, mice, cameras, printers, and storage drives.