This paper revisits several problems in self-tuning control. The starting p
oint is regulation of industrial processes. The desire to solve these probl
em was a driver for much of the research. Control design is discussed from
the point of view of moving average control, system identification and self
-tuning control. These are all areas where Peterka has given major contribu
tions. The paper is of expository character but it also provides background
and perspective. Copyright (C) 1999 John Wiley & Sons, Ltd.