There are three major areas of computerized automation application which can contribute significantly to energy savings in buildings and building complexes: 1. simplified and more meaningful operator interface; 2. equipment maintenance scheduling and direction; and 3. automatic control functions. Before discussing any of these applications, I want to clear the air of the preconceived notion that a $100,000 processor or even a $50,000 processor is required to implement anything of significance. While it is true that a processor can cost $100,000 or even more, it is not true that such a processor is required to implement the majority of the routines which provide the greatest savings. Computerized automation is within economically justifiable reach of the surprisingly small building. This is, however, a rather recent development.