During the ancient Greek times, many inventions and advancements were made. Many of the inventions created in this time are still used today. One example is the Antikythera Mechanism, which is like the modern day calculator or computer. Another creation is the Archimedes Screw, a device that was used for lifting water and irrigation. Catapults were a lethal war weapon invented by the Greeks so hand-to-hand combat wasn't necessary and to have more successful war campaigns. Not only did the Greeks have physical inventions, they were also innovative in their way of government. The idea of democracy has left an impact on modern society. The ideas and knowledge of the Greeks have contributed to a better world.