Windows 7
Windows 7 is the current release of Microsoft Windows, a series of operating systems produced by Microsoft for use on personal computers, including home and business desktops, laptops, netbooks, tablet PCs, and media center PCs. Windows 7 was released to manufacturing on July 22, 2009, and reached general retail availability worldwide on October 22, 2009, less than three years after the release of its predecessor, Windows Vista.
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Mac OS X is the world’s most advanced operating system, built upon a proven UNIX® foundation, coupled with a GPU-accelerated desktop, intuitive networking services, and system-wide optimization for multicore CPUs. And with the Xcode integrated development environment, you have a powerful suite of tools to create engaging, innovative, and high-performance apps.
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Ubuntu is a computer operating system based on the Debian Linux distribution and distributed as free and open source software, using its own desktop environment. It is named after the Southern African philosophy of Ubuntu ("humanity towards others"). Ubuntu is designed primarily for use on personal computers, although a server edition also exists.
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