It introduces the readers to cat I A v5-6r2016, one of the world's leading parametric solid modeling packages. In this textbook, the author emphasises on the solid modeling techniques that improve the productivity and efficiency of the users. The chapters in this textbook are structured in a pedagogical sequence that makes it very effective in learning the features and capabilities of the software. Table of Contents: br>Chapter 1: Introduction to cat I A v5-6r2016 br>Chapter 2: drawing sketches in the sketcher workbench-i br>Chapter 3: drawing sketches in the sketcher workbench-ii br>Chapter 4: constraining sketches and creating base features br>Chapter 5: reference elements and sketch-based features br>Chapter 6: creating dress-up and hole features br>Chapter 7: editing features br>Chapter 8: transformation features and Advanced modeling tools-i br>Chapter 9: Advanced modeling tools-ii br>Chapter 10: Working with the reframe and Surface design workbench br>Chapter 11: editing and modifying surfaces br>Chapter 12: assembly modeling br>Chapter 13: Working with the drafting workbench-i br>Chapter 14: Working with the drafting workbench-ii br>Chapter 15: Working with sheet metal components br>Chapter 16: dmu Kinematics br>Chapter 17: Working with the freestyle workbench br>Chapter 18: Introduction to generative shape design.