Yellow-orange logo of the linux ubuntu operating systemYellow-orange logo of the Linux Ubuntu operating system
Stills from the tv series doctor house. people are standing in the operating roomStills from the TV series Doctor House. People are standing in the operating room
Microsoft windows 8 operating system in a minimalist styleMicrosoft Windows 8 operating system in a minimalist style
Operation barbarossa. the soviet army is trying to break through the german corps. onethousandninehundredfortyoneOperation Barbarossa. The Soviet army is trying to break through the German corps. onethousandninehundredfortyone