The word "machinery" originates from the Greek word Mechine and the Latin word Machina. The earliest definition of "machinery" was by the ancient Roman architect Vitruvii in his book "Ten Books of Architecture", The main difference is made between machinery and tools that are effective in handling heavy objects: machinery and tools There seems to be the following differences between them. Machinery, such as heavy crossbows and grape presses, produces effects through most manual labor and significant force. Tools, on the other hand, are carefully handled by an operator to achieve their goals, such as scorpion shaped light crossbows or unequal circular spiral devices. Therefore, tools and machinery are indispensable for utilization. During ancient Greece, cylindrical gears existed. Heron of Alexandria first discussed the basic elements of machinery in the 1st century, believing that there are five types of mechanical elements: wheels