operating-system

Windows 8 logo on blue background

1920 × 1080

Windows 8 desktop background

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Windows 8 logo on dark background

1920 × 1080

Ubuntu logo on dark background

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Windows 8 startup screen

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Windows 7 desktop background

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Ubuntu logo on orange background

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Ubuntu logo on dark background

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Ubuntu logo on blue background

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Ubuntu logo on blue background

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Ubuntu logo on dark background

2560 × 1920

Ubuntu splash screen

1024 × 600

Ubuntu logo on gradient background

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Ubuntu logo on purple background

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Ubuntu logo in space

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Debian GNU/Linux logo

1440 × 900

Next version of Windows

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Ubuntu login screen

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Windows 8 logo with smoke effect

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Windows 7 logo on orange background

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Windows 8 logo on wood

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Windows 7 desktop background

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Windows Vista default wallpaper

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Windows 7 logo on dark background

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Windows 7 startup screen

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Windows 7 logo on green

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Windows 7 logo on orange

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Mac OS X Leopard release

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Windows 7 logo on blue background

1680 × 1050

Windows 7 startup screen

1024 × 768

Linux Mint branding wallpaper

1600 × 1200

Windows 7 startup screen

1024 × 768

Mac OS X Lion logo

1920 × 1200

Ubuntu logo on gradient background

1920 × 1080

Ubuntu logo with fractal background

1920 × 1080

Windows 8 logo on nature background

1920 × 1200