Vintage IBM Disk Operating System Version 3.20 w/ disks Reference, User's Guide

Description

Vintage Computer Manual and Software!!
Disk Operating System Version 3.20 -- Reference (binder), User's Guide (spiral), Quick Reference Card + two floppy disks
-- IBM publication #6280057, published by IBM, First Edition (February 1986). Main Book is a hardcover binder with various paging, plus two floppy disks in a plastic sleeve at back of binder. The disks are: "DOS - Version 3.21" and "DOS Supplemental Programs - Version 3.20". Binder is stored in a hard gray slipcase. Includes spiral bound "User's Guide" and "Quick Reference Card" plus a loose brochure.
Condition of books is excellent and complete. Slipcase has some wear on edges.
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