Over the last few years, the Universal Serial Bus (USB) has become the universal interface. Starting in 1995, when USB 1.0 could only transfer 12 Mbps (Megabits per second), the standard started up slowly. But when USB 2.0 came along in 2000, with its 480 Mbps, the days were numbered for PS/2, serial, parallel, and even the FireWire interface. So, why hasn’t USB 3.0, also known as SuperSpeed USB, with its 5 Gigabits per second (Gbps), become the interface of choice since its introduction in 2008? Well, there are several reasons.