Tandem Computers was an early manufacturer of fault tolerant[?] computer systems.
Tandem was founded by a group of engineers, led by James Treybig[?], who came from Hewlett-Packard.
The main product line was called NonStop[?] and ran a proprietary operating system called Guardian.
Tandem systems are used in critical applications where no downtime can be tolerated, such as banks and stock exchanges.
Tandem was acquired by Compaq in 1997. In an ironic full-circle, Compaq was later acquired by HP in 2002, bringing Tandem back to its original roots. As of 2003, the NonStop product line continues to be produced, under the HP name.
