The product is the first edition of “FORTH Fundamentals” by C. Kevin McCabe. It is a trade paperback book published by Dilithium Press in 1983. The book covers the subject area of programming languages and specifically focuses on the FORTH programming language. With 236 pages, this textbook provides a comprehensive introduction to the fundamentals of the FORTH language and is a valuable resource for those looking to deepen their understanding of this specific programming language.