From ZDNET:

IBM's xSeries freestanding 232 and its 5.25-inch thick rack-mountable 342 servers both feature "software rejuvenation," the ability to automatically reboot Windows machines periodically as a less inconvenient alternative to them crashing on their own. (my emphasis).

Har har har har har har BONK
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One of the few remaining Mk1 owners... #00015