Image of the operating system with pictures of nature
Windows operating system logo on a black background
Yellow-orange logo of the Linux Ubuntu operating system
Operating system for mobile phones and other platforms
Drawing flame of war Operation torch M4 tanks in Normandy
Night operation on May 17, 1943 at the dam art drawing
Aircraft, AN-72P for search and rescue operations of the USSR Russia
Art of the Soviet sanitary aircraft, which was operated until the mid-1960s