Type set is a term used to describe the process of arranging and assembling pieces of type into a form that can be used for printing. It is a process that has been used since the invention of the printing press in the 15th century. Type setters would arrange individual pieces of type into a form that could be used to print documents. The FONT of the type set was determined by the type setter, and it was important to ensure that the FONT was consistent throughout the document.