Pre-owned this product is a vintage 1980 textbook titled “Sixty-Five Two Software Design” by author Leo J. Scanlon. Published by SAMS, this 1st edition fifth printing 1982 trade paperback is 272 pages long and focuses on the subject area of computers. Written in English and designed for adult education and further education levels, it is an advanced level textbook that provides insights into software design principles for the 6502 computer system. This book offers a valuable resource for those interested in vintage computer technology and software development.