The origins of three pivotal inventions that enable Man to organize, plan, and keep track of his life.

Originally released by Bellum Entertainment, 2015. Streaming video file encoded with permission for digital streaming by Infobase on June 03, 2016.

Clocks: Measuring Time Accurately (2:38); --Clocks: Grandfather Clock (3:14); -- Calendars: Ancient Marvels (2:14); -- Calendars: Conquests and Calendar Evolution (1:59); -- Calendars: Impact of Religion (1:56); -- Calculators: Accounting Records (2:20); -- Calculators: Mechanical Calculators (2:32); -- Calculators: Electronic Models (1:39); -- Origins Spotlight: Necessity of Scales (1:45); -- Credit: Clocks, Calendars, & Calculators: Origins-The History of Everything! (0:25); .