The small USB socket found on digital cameras, external hard drives, USB hubs and other equipment. The Mini-B plug and socket are all that remain of the USB Mini connectors after the Mini-A plug and Mini-AB socket were made obsolete for USB On-The-Go (see USB OTG). USB 2.0 uses Mini-B connectors, whereas USB 3.0 provides only Micro connectors. See USB 3.0 and USB.
Mini-B Is Widely Used
Digital cameras typically have a Mini-B USB socket for the Mini-B/Type-A cable that plugs into the computer or hub.
Sockets on a Hub
This Belkin hub, which plugs into a wall outlet for power, is connected to the computer by a Mini-B/Type A cable. It provides four Type A ports for peripherals, netting out to only three extra, because one Type A port on the computer is used to connect the hub.