In engineering, they used to use the foot ' inch '' line ''' and point '''' where each unit was 1/12th the size of the previous one. The european typographic po

In engineering, they used to use the foot ' inch '' line ''' and point '''' where each unit was 1/12th the size of the previous one. The european typographic point used to be 1/144th of an inch. Watch components are measured in points.