The book was written on the basis of the most modern methodology of distance learning courses on the popular graphic editor KOMPAS-3D LT within the framework of the project "Educational Network Olympiads." This book is a tutorial for those who want to quickly master computer-aided design and modeling. This tutorial is a step-by-step guide that will improve your understanding of the process of creating a "computer drawing" in the plane and in space. The material of the book is presented in the form of lessons with practical tasks containing detailed algorithms for their implementation.