An introduction to the essential features of the analysis and design of information systems, introductory students should find this straightforward approach and language digestible and informative. The text provides them with the necessary foundations for the further study of information systems development. SSADM version 4+ is used as the medium for discussing the modelling of information systems, present and proposed, and for relational data analysis (RDA or normalization). An introduction to the analysis of requirements for information systems includes a brief exposition of soft systems methodology (SSM). Also, in order to describe the processes carried out in information systems, there is a presentation of the techniques of decision tables, decision trees and structured English.