A number of general technologies can contribute to increased efficiency and productivity in manufacturing. These include computer control of building environments, computer control of processes or major energy-using equipment, waste heat recovery, and adjustable-speed motors. About 70% of U.S. steel industry establishments reported using one or more of these technologies in 1994. Most frequently cited in the steel industry is the use of computer control of processes or major energy-using equipment (about 57%). [MECS 1994]