This book tries to give students of computer science and professional
rammers a general understanding of operating systems--the programs
enable people to share computers efficiently.
To make the sharing of a computer tolerable, an operating system must
rce certain rules of behavior on all its users. One would therefore
ct the designers of operating systems to do their utmost to make them
mple, efficient, and reliable as possible.
A number of operating systems made in the early 1960's had these
acteristics; but in the late 1960's designers were often overambitious
built enormous systems with poor performance.
see no inherent reason why operating systems should not reach the
ty of program construction found in present compilers; this will
re an understanding of the principles common to all operating systems
a consistent use of safe methods of designing large programs. It is my
that this book will give you a start in this direction.
assume that you are familiar with the basic structure of computers
programming languages and have some experience in writing and
ng non-trivial programs. In a few cases a knowledge of elementary
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