The aim of this revised and expanded edition is to help the reader to acquire and develop the skill of computer programming in a block-structured language and to foster an understanding of the related topics of data structures and data processing. No previous knowledge of computer programming or computer concepts is assumed. The book is intended particularly for students of Computer Studies to GCE Advanced level, BTEC National and Higher National awards, first-year undergraduate level and British Computer Society Part One examinations. It should also be suitable for students needing a knowledge of programming, but whose major course of study is not computing - for example, engineering students and those requiring a self-study course - and as a primer for readers who can already program in other languages, but wish to learn PASCAL in the shortest possible time. An ELBS/LPBB edition is available.