The Norden Bombsight was an early analog computer, made of around 2000 parts including gyroscopes, and designed to precisely drop bombs from a moving aeroplane.

The Norden Bombsight was an early analog computer, made of around 2000 parts including gyroscopes, and designed to precisely drop bombs from a moving aeroplane. The bombsight was regarded as such a strategic advantage that all efforts were taken to keep it secret - such as embedding an incendiary charge inside the sight which would destroy it in case a plane was shot down.