6IBM 5120 Two years after launching the 5110, IBM introduced its 5120 Computer System in February 1980 as the lowest-priced IBM computer to date.

Seven months after IBM delivered the world's fastest supercomputer, it has announced an even speedier one with the computing power of 2 million laptops.

IBM says Sequoia will be highly energy-efficient for the job it does but even so will occupy 96 refrigerator-sized racks in an area the size of a big house -- 3,422 square feet (318 square metres).

China’s Lenovo Group is buying IBM’s server business for $2.3 billion, expanding a product line-up dominated by PCs, tablets and smartphones.