In April 1989 CDC decided to shut down the ETA operation and keep a bare-bones continuation effort alive at CDC. At shutdown, 7 liquid-cooled and 27 air-cooled machines had been sold. At this point ETA had the best price/performance ratio of any supercomputer on the market, and its initial software problems appeared to be finally sorted out. Nevertheless, shortly thereafter CDC exited the supercomputer market entirely, giving away remaining ETA machines free to high schools through the SuperQuest computer science competition.