The document discusses several key concepts related to computer graphics and the OpenGL API: 1. It outlines 7 major groups of functions in OpenGL including primitive functions, attribute functions, viewing functions, and more. 2. It explains that primitives are the basic display objects like points and lines, while attributes determine properties like color. 3. Viewing functions allow specifying the camera position and lens, but OpenGL relies on transformations. 4. The document provides an overview of common tasks and concepts in computer graphics like mapping coordinates, displaying different primitive types, and approaches to representing color.