- A computer system designed in India has made it into a top ten of the world's fastest supercomputers.
Computer giant IBM continues to dominate the list - which is compiled twice a year - with a total of 232 out of the top 500 supercomputers.
Its Blue Gene/L supercomputer - used to ensure the US nuclear weapons stockpile remains safe and reliable - comes out at number one.
The Indian system - known as EKA - made it into fourth place.
The world's fastest supercomputer - BlueGene/L - has been significantly upgraded in the last six months.
It can now deliver a sustained performance of 478 trillion calculations per second (478 teraflops), nearly three times faster than any other machine on the list.
Second place went to another IBM system - a newer version of BlueGene/L known as BlueGene/P. The system, introduced this June is the first in a batch of IBM machines designed to operate at a petaflop and beyond.
Breaking the petaflop barrier - the ability to process 1,000 trillion calculations every second - has long been a key milestone in supercomputing and would allow highly detailed simulations.
For example in earthquake simulations it could show building-by-building movements of regions in earthquake zones,...