The Unified Modeling Language User Guide is a textbook published by Addison Wesley Professional in 1998. Authored by Ivar Jacobson, Grady Booch, and James Rumbaugh, this hardcover book covers various subjects in software development, programming, and object-oriented design. With 512 pages, this comprehensive guide offers the ultimate tutorial to the Unified Modeling Language from the original designers themselves. It is a valuable resource for those looking to enhance their knowledge and skills in the field of computer technology.