District Judge Thomas Penfield Jackson said in June that Microsoft should be split in two as its sentence for abusing its dominant position in the personal computer operating system market.

BBC: Microsoft appeal decision looms

This software colossus's domination of the personal computer's operating-system market is complete.

ECONOMIST: America��s trustbusters may have moved too soon

Recognized as the undisputed industry leader, Sony Computer Entertainment America Inc. markets the PlayStation family of products and develops, publishes, markets and distributes software for the PS one game console, the PlayStation 2 computer entertainment system, PLAYSTATION 3 and the PSP system for the North American market.

ENGADGET: Sony announces 'snackable' 100MB Minis for PSN Store

While the company distributes millions of copies of its dominant Windows operating system (which holds about 90% of the PC market) through computer makers such as HP, Dell, Toshiba, Lenovo and others, the company reached a deal with Nokia to begin to expand its smartphone presence.

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It was the first mass-market idiot-proof touch-to-get operating system that provided a computer experience to people without the experience or the inclination to use one.

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