QBU or QBUS may refer to:
QBU-191, a Chinese designated marksman rifle QBU-10, a Chinese anti-materiel sniper rifle QBU-88, a Chinese designated marksman rifle QBU, a nickname for the University of Miami Hurricanes football program Q-Bus, a technology used with PDP and MicroVAX computer systems QBUS Cambuslans, a BT site engineering code Qualified business unit, an accounting concept