The term 'OX harness' is composed of two words: 'YOKE' and 'OX'. A YOKE is a wooden beam that is used to connect two animals, such as oxen, to a cart or plow. The YOKE is placed across the shoulders of the animals and is used to evenly distribute the weight of the load they are pulling. Oxen are large, strong animals that have been used for centuries to pull heavy loads. They are still used in some parts of the world today.