MODULA-2 is a new programming language which was created by Niklaus
Wirth of the Swiss Federal Institute of Technology (ETH) in Zurich. The
lan- guage is derived from PASCAL: it includes all aspects of PASCAL and
some- times improves on them. Moreover, MODULA-2 includes the important
"mod- ule" concept, as well as multiprogramming capabilities and a way
of implemen- ting low-level software in an elegant manner. In summary,
MODULA-2 may be used equally well as a general-purpose programming
language and as a system implementation language. MODULA-2 provides the
programmer with a good way of writing high quality software. In
particular, modules are powerful tools for achieving modularity,
reliability, readability, extensibility, reusability and ma-
chine-independence. This book presents the complete MODULA-21anguage
from the beginning. Each topic is presented by means of numerous
examples and each concept is justified. The syntax of the language is
explained using syntactic diagrams. This book is not a reference manual
for MODULA-2, but a textbook from which the student can learn the
language progressively. The most important con- cepts (i.e. procedures,
modules and data structures) are explained in great detail and
methodological aspects are also emphasized. Beginning in the first
chapter, the student may execute his/her own pro- grams. Program
examples in this book have been executed on several machines (APPLE II,
IBM PC and VAX 11/780) and they may be taken as a basis for stu- dents.