Universal Serial Bus
USB's full name is this,,A blink of an eye,USB 1.0 standard came from the 3.0,of course,Little blue box 3.0 also does not fully into our lives,As it is now around us phone、flat、SLR,Almost still in use USB2.0 standard,Occasionally,People around him or will not tell exactly which line corresponds to which device,What can mix,[……]