Tandem

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tandem

[′tan·dəm]
(aerospace engineering)
The fore and aft configuration used in boosted missiles, long-range ballistic missiles, and satellite vehicles; stages are stacked together in series and are discarded at burnout of the propellant for each stage.
(electricity)
Two-terminal pair networks are in tandem when the output terminals of one network are directly connected to the input terminals of the other network.

Tandem

(Tandem Computers Inc., Cupertino, CA) A former major manufacturer of fault-tolerant computers founded in 1974 by James Treybig and provider of the early 21st century technology for HP's enterprise computing strategy. Tandem was the first company to address the transaction processing (OLTP) market for online reservations and financial transfers by providing computers designed from the ground up for fault-tolerant operation. These computers are used in all the major banks, stock exchanges, credit card companies and ATM machines in the world.

Tandem's most significant product was its MIPS-based Himalaya series which ran the NonStop Kernel operating system, compatible with Tandem's Guardian OS. This platform lives on in the NonStop S-series servers from HP, which acquired Tandem's technology via Compaq in 2002. Compaq purchased Tandem in 1997. See ServerNet.


James Treybig
Treybig founded Tandem and was at its helm for more than 20 years. (Image courtesy of Tandem Computers Incorporated.)






NonStop Processing
Tandem was the first company to build fault-tolerant systems for the OLTP market. At the top is Tandem's first NonStop system in 1976. At the bottom is the K10000, a massively parallel server that can scale up to 4,000 processors. (Images courtesy of Tandem Computers Incorporated.)


NonStop Processing
Tandem was the first company to build fault-tolerant systems for the OLTP market. At the top is Tandem's first NonStop system in 1976. At the bottom is the K10000, a massively parallel server that can scale up to 4,000 processors. (Images courtesy of Tandem Computers Incorporated.)
References in periodicals archive ?
Behrman Capital's initial investment in Tandem in 1998 was the second equity investment for Behrman's second fund, the $518 million Behrman Capital II L.
In tandem with the acquisition of Blue Sky, the NMDA is moving forward to gain a second strong revenue source from the motorcycle rental market with its offering of rental program services through Wildside Rentals.
Brava Reader is used in tandem with IGC's publishing products, such as the Net-It(R) Now client-side publisher and the soon-to-be-released Net-It CAD publishing plug-ins.