This is an original IBM Personal Computer AT (PC AT) Installation and Setup manual, part of the Personal Computer Hardware Reference Library. This comprehensive guide, presented in a sturdy ring binder, provides essential information for setting up and understanding your IBM PC AT system. It includes instructions for installation, hardware overview, and possibly internal option installation, as seen from the section dividers. A valuable resource for collectors, enthusiasts, or anyone maintaining vintage IBM hardware. The manual is in good, readable condition within its protective slipcase, showing some signs of age and use typical for a vintage item.