The industry which springs most readily to mind is the automotive enthusiast aftermarket, the hot-rod industry. It comprises to a very large extent relatively small businesses that are limited to tiny production volumes, compared for instance to the mainstream motor industry. It is under constant threat from a legislative edifice that is designed at best to keep such an industry peripheral, at worst to eliminate it summarily. Other salient aspects are the way this industry is enthusiasm/product-driven; the way consumers and producers interact socially and consumers participate in processes; the way it holds vernacular technical definitions; the way the boundaries between manufacture, maintenance, and modification are indistinct; and the way it constantly absorbs more and more traditionally mass-production techniques and somehow makes them work at a small scale.