I thought that a type-B USB plug was a type-B USB plug. But some sources say that type B is 4 pin, while others say it's 5 pin.Are they confused or am I?

The USB Mini-B is a five-pin connector that came out at the same time as the USB 2.0 standard in 2000. The new standard was an improvement over earlier versions and supported data transfer speeds ...

The USB Mini-B is a five-pin connector that came out at the same time as the USB 2.0 standard in 2000. The new standard was an improvement over earlier versions and supported data transfer speeds ...

Like the Type A, the end that connects to the PC uses a USB 4-pin connector plug. The other end however, uses a smaller Type B plug to connect into a Type B jack located on the printer.

News Lok-It USB memory stick has built-in PIN keypad By John E. Dunn APR 26, 2010 5:01 am PDT ...