🌟 Vintage 1972 IBM DOS/VS Manual Module 4 Virtual Systems Reference ZY23-4033-0 For Sale

🌟 Vintage 1972 IBM DOS/VS Manual Module 4 Virtual Systems Reference ZY23-4033-0
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🌟 Vintage 1972 IBM DOS/VS Manual Module 4 Virtual Systems Reference ZY23-4033-0:
$98.76

Up for sale is a rare piece of computer history: an original First Edition (June 1972) IBM Education Reference Document covering Virtual Systems Disk Operating System/VS (DOS/VS), designated as Module 4 (Form ZY23-4033-0).


This manual is a fantastic artifact from the dawn of IBM's virtual storage era, featuring detailed technical system layout schematics, real storage mapping diagrams, and system configurations (such as Page Pool allocations and supervisor areas).


The loose-leaf document features the iconic 1970s IBM modernist graphic design cover and is securely housed in its vintage brown, textured faux-leather ACCO corporate binder with a functioning metal fastener bar.


(Please review all high-resolution listing photographs to assess the exact cosmetic condition before purchasing.)

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Documentation