Wheel

 WHEEL n. 1. A privilege bit that canonically allows the possessor to
       perform any operation on a timesharing system, such as read or write
       any file on the system regardless of protections, change or or look at
       any address in the running monitor, crash or reload the system, and
       kill/create jobs and user accounts. The term was invented on the TENEX
       operating system, and carried over to TOPS-20, Xerox-IFS and others.
       2. A person who posses a wheel bit. "We need to find a wheel to
       unwedge the hung tape drives."