If you're still thinking about what operating system to use in your PC or a laptop, here is an article that will help you consider some important factors before finally deciding.
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Ubuntu 11.04 vs Windows 7 vs OS X 10.7 (Lion)
"The tests were run on a brand-new 2.5GHz Core i5-2400S iMac with 4GB RAM. We ran our benchmarks under each operating system, formatting the hard disk and performing a clean installation each time. The benchmarks record in seconds the time the computer takes to perform each task. These scores are then normalised against a PC with an Intel Core i5-2500K processor running Windows 7, which scores 100 in each test. We used the same versions of our three bits of key software - ImageMagick, Handbrake and Mplayer - on all three operating systems. Where possible we used the binary distributions, but ImageMagick 6.7.1 had to be installed from source on our Ubuntu PC."
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