For the editors of this book, as well as for many other researchers in
the area of fault-tolerant computing, Dr. William Caswell Carter is one
of the key figures in the formation and development of this important
field. We felt that the IFIP Working Group 10.4 at Baden, Austria, in
June 1986, which coincided with an important step in Bill's career, was
an appropriate occasion to honor Bill's contributions and achievements
by organizing a one- day "Symposium on the Evolution of Fault-Tolerant
Computing" in the honor of William C. Carter. The Symposium, held on
June 30, 1986, brought together a group of eminent scientists from all
over the world to discuss the evolu- tion, the state of the art, and the
future perspectives of the field of fault-tolerant computing. Historic
developments in academia and industry were presented by individuals who
themselves have actively been involved in bringing them about. The
Symposium proved to be a unique historic event and these Proceedings,
which contain the final versions of the papers presented at Baden, are
an authentic reference document.