Unit technologies produce one item or unit at a time or a few items all at once. Mass production technologies deliver high numbers of identical products using highly routinized and often mechanized procedures. The continuous processing is a series of non-discrete transformations occurring in a sequence. Mediating technologies serve parties by bringing them together in an exchange or other transaction. Intensive technologies necessitate coordinating the specialized abilities of two or more experts in the transformation of a usually unique input into a customized output.