Ada Plus Data Structures is the most up-to-date, student-friendly Ada text available. Using the newly updated Ada 2005, the text introduces and discusses such familiar topics as strings, sets, stacks, queues, lists, trees, graphs, and much more. The recurring theme throughout the text is modeling with levels of abstraction, presenting each class from three different perspectives: their specification, their abstraction, and their implementation. Using this approach, the authors stress computer science theory and software engineering principles including information hiding, data encapsulation, data abstraction, stepwise refinement, and visual aids. With its object-oriented presentation, real-world applications, and traditional Dale Pedagogy, Ada Plus Data Structures is a pleasure to read and learn from.