CATIA V5 is organized into specialized "workbenches," each containing a unique set of tools tailored for specific engineering tasks:
If you have downloaded the "Introduction to CATIA V5.pdf" but only have 10 minutes to learn, skip to the workflow section. Here is the logical flow every PDF document should teach you.
Before you can build a 3D engine block, you must draw a 2D circle. The Sketcher is where all geometry begins. A standard will dedicate significant pages to this module.