A research project to investigate the design and construction of
reliable computing systems was initiated by B. Randell at the University
of Newcastle upon Tyne in 1972. In over ten years of research on system
reliability, a substantial number of papers have been produced by the
members of this project. These papers have appeared in a variety of
journals and conference proceedings and it is hoped that this book will
prove to be a convenient reference volume for research workers active in
this important area. In selecting papers published by past and present
members of this project, I have used the following criteria: a paper is
selected if it is concerned with fault tolerance and is not a review
paper and was published before 1983. I have used these criteria (with
only one or two exceptions!) in order to present a collection of papers
with a common theme and, at the same time, to limit the size of the book
to a reasonable length. The papers have been grouped into seven
chapters. The first chapter introduces fundamental concepts of fault
tolerance and ends with the earliest Newcastle paper on reliability. The
project perhaps became well known after the invention of recovery
blocks - a simple yet effective means of incorporating fault tolerance
in software. The second chapter contains papers on recovery blocks,
starting with the paper which first introduced the concept.