The original description of Pascal by the designer of the language has been up-dated to incorporate the ISO-standard. Revisions to Niklaus Wirth's classic, Pascal: User Manual and Report include: Wirth's EBNF syntactical notation - an expanded user manual with improved programming examples - a thorough appendix summarizing changes in the language necessitated by the ISO-standard. What is left unchanged is the rigor and precision that made PASCAL: User Manual and Report the definitive reference for nearly a decade.