Tier 8 (Picture: A diagram of a micro USB port with its pins labeled “VBUS”, “MHL-“, “MHL+”, “CBUS”, and “GND”, these pins are connected to various pins on an HDMI port to the right): BusKill, WebUSB, MHL Alt-mode, VirtualLink Alt-mode.
Tier 9 (Picture: an upside down mini-USB port with extra pins on tongue): Enhanced Mini-USB Connectors, Analog Audio over USB, InterChip USB