Radar was invented in the mid-1930s to provide early warning of an impending attack. While radar is still used in the military, it has spread to many civilian uses such as air traffic control systems, sensing for autonomous vehicles, and to the chagrin of many motorists, speed monitoring systems.

Radar was invented in the mid-1930s to provide early warning of an impending attack. While radar is still used in the military, it has spread to many civilian uses such as air traffic control systems, sensing for autonomous vehicles, and to the chagrin of many motorists, speed monitoring systems.

Radar was invented in the mid-1930s to provide early warning of an impending attack. While radar is still used in the military, it has spread to many civilian uses such as air traffic control systems, sensing for autonomous vehicles, and to the chagrin of many motorists, speed monitoring systems.

Radar was invented in the mid-1930s to provide early warning of an impending attack. While radar is still used in the military, it has spread to many civilian uses such as air traffic control systems, sensing for autonomous vehicles, and to the chagrin of many motorists, speed monitoring systems.