A reference book on linear resistive electric circuits for engineering students and practitioners, using the TI-84 and similar graphic calculators. The book focuses in the process of learning and critical thinking to use the calculator as an effective tool. It includes some topics not covered in normal courses.Emphasis is used in the calculator as a tool in the process of learning. The main focus is learning, and the calculator is the tool for solving complex problems thanks to the graphics and calculating features. Programming is not a focus, but programs are included. The programs in the book illustrate how to apply your knowledge to improve the use of the calculator beyond a simple tool. The programs are developed from scratch including the planning process.. The dedicated reader will find programming examples interesting enough to trigger the desire to develop hisher own programs with more features.Some theorems included in the book are usually not present in textbooks. They provid