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Currently (June 2010) the fastest supercomputer in the US (and, indeed, the world) is Jaguar at Oak Ridge National Laboratory. China's Nebulae at the National Supercomputing Center in Shenzhen has a higher theoretical peak performance, but loses out (by a small amount) in real-world tests.
If you mean physically... I'm not aware of any listing. Many distributed computing solutions can grow quite large (though physical size does tend to impact performance to some extent for most problems). Virtual supercomputers such as the Great internet Mersenne Prime Search project or SETI@Home extend literally worldwide.
What else can I help you with?
What company operates the largest civilian vehicle fleet in the world?
the US postal service
What are the two largest uses of freshwater in the US?
Answer: Thermoelectric power and irrigation ;)
What is the largest artillery in use today by US armed forces?
The largest tube artillery the US uses is the 155mm howitzer. They also use 270mm multiple rocket launchers.
How much does the Tianhe-1A Chinese supercomputer cost?
Between 2,000,000 to 2,500,000 million dollars in the US
Which consumer uses the most water in the US each year?
According to the US Geological Survey, thermoelectric power generation is the largest user of water in the US each year, accounting for more than 40% of total freshwater withdrawals for all uses.
Who operates the catholic schools in the US?
The Archdiocese does
Is the US the worlds largest importer and exporter?
The US is the largest importer China is the largest exporter then Germany then the US
Do you need a voltage converter when traveling from the US to the UK?
Yes, you will need a voltage converter when traveling from the US to the UK because the UK operates on a 230V electrical system, while the US operates on a 120V system.
What Largest state in the US?
The largest state in the US is Alaska
Is it legal for an individual or a private citizen to own a supercomputer?
(in the US) There is no law against the amount of computing power you may own, only your wallet.
Does Ireland have the same money as us?
No. Ireland uses the Euro. The US uses the American Dollar.
Is NY the largest state in the US?
No, Alaska is the largest US State.
