Mac Os X Lion Logo — Gray

1600 × 900

Apple and Linux penguin

1280 × 1024

Windows Logo on Green — Minimalist, Digital Art

1920 × 1200

Windows logo on dark background

1366 × 768

Windows logo on a blue background

1600 × 1200

Penguin with Text

1280 × 1024

Ubuntu logo under magnifying glass

1280 × 1024

Ultimate OS concept art

1920 × 1080

OS icons on black background

1920 × 1200

Mac OS X Leopard logo

1024 × 768

Mac OS X Tiger desktop

2560 × 1582

Wave Curling in Ocean — Blue, Dramatic, Photograph

1280 × 1024