Dedicated to the IBM OS2 Warp operating system and is intended for both users and programmers. In it you will find everything you need to get started with this operating system. This is a description of the principles underlying IBM OS2 Warp version 3.0, the installation procedure, a description of the main techniques for working with the Workplace Shell, which implements an object-oriented user interface, working in an IBM OS2 Warp environment with DOS programs and Microsoft Windows applications.