micro and mini USB both had three variants - A, B, and A/B - as part of USB OTG (On the Go). This is because they wanted you to be able to connect a computer t

micro and mini USB both had three variants - A, B, and A/B - as part of USB OTG (On the Go). This is because they wanted you to be able to connect a computer to a camera, but also to be able to connect that camera to a printer.