The term 'Linking Device' can be summarized as a YOKE, which is a four letter word. A YOKE is a device that is used to link two or more animals together, such as oxen, so that they can work together in pulling a load. It is also used to link two or more pieces of equipment together, such as a plow and a tractor, so that they can work together. In addition, the term 'YOKE' is sometimes used metaphorically to refer to any kind of connection between two or more things.