Steaming was a method of execution used by the Company. It involved the victim being put into a condensation chamber with a heat exchanger, regulated by water pump, turning the water into high-pressure steam that then went into the condensation chamber thus scalding the victim.
Leela was sentenced to be placed in to the steamer for rebelling against the Company. The proceedings could be seen in person for five talmars and the Collector himself turned out to watch Leela's execution. Alternatively, it could be seen on the public video system, though this was considered an unsatisfactory substitute by the Collector, who liked to hear every scream.