The product is a textbook titled “Advanced MS-DOS Programming: The Microsoft Guide for Assembly Language and C Programmers” by Ray Duncan, published by Microsoft Press in 1986. It falls under the subject area of Computers, specifically focusing on operating systems and general programming. The book is written in English and is designed for advanced level programmers looking to enhance their skills in assembly language and C programming. With a total of 496 pages, this trade paperback is a valuable resource for anyone interested in expanding their knowledge in the realm of MS-DOS programming.