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Description: This Vintage 1989 MICROSOFT MS DOS Version 4.0 manual set was issued for ZENITH DATA SYSTEMS and includes four spiral-bound computer reference guides. The set includes the User's Guide and Command Reference, User's Reference, Quick Reference Guide, and MICROSOFT MS DOS Shell User's Guide, matching ZENITH documentation records for the 1989 MS DOS 4.0 release. These manuals cover DOS commands, system operation, reference information, and the graphical DOS Shell for period-compatible personal computers. Pre-owned condition with light age and storage wear plus minor cover marks, with no major damage noted in the photos. This is a useful original documentation set for vintage computer collectors, retro PC restorers, DOS enthusiasts, and ZENITH DATA SYSTEMS collectors. - MICROSOFT MS DOS Version 4.0 ZENITH DATA SYSTEMS four manual reference set
- Spiral-bound paper manuals with original ZENITH DATA SYSTEMS Groupe Bull branding
- White covers with blue typography and line graphics
- Includes User's Guide and Command Reference, User's Reference, Quick Reference Guide, and MS DOS Shell User's Guide
- Pre-owned with light age, storage wear, and minor cover marks
- Copyright 1988 MICROSOFT and 1989 ZENITH DATA SYSTEMS; official ZENITH records identify the Version 4.0 manuals as 1989 publications
- Country of Origin: United States
Item Specifics: - Brand: MICROSOFT
- OEM Brand: ZENITH DATA SYSTEMS
- Product: Computer Manuals
- Operating System: MS DOS Version 4.0
- Type: User Manual and Reference Guide Set
- Quantity: 4 Manuals
- Language: English
- Publication Year: 1989
- Era: Vintage 1980s
- Binding: Spiral Bound
- Subject: Computer Operating Systems
- Topics: DOS Commands, Command Reference, DOS Shell, User Reference
- Included Titles: User's Guide and Command Reference; User's Reference; Quick Reference Guide; MS DOS Shell User's Guide
- Publisher / Distributor Branding: ZENITH DATA SYSTEMS Groupe Bull
- Software Included: No software or disks are visible
- Condition: Pre-Owned
- Country of Origin: United States
Important Keywords: - MICROSOFT MS DOS 4.0
- ZENITH DATA SYSTEMS manual
- MS DOS manual set
- Vintage computer manual
- DOS Shell User's Guide
- DOS command reference
- MS DOS Quick Reference Guide
- User's Reference manual
- 1989 computer documentation
- Vintage PC documentation
- Retro computing
- DOS collector
- OEM computer manual
- ZENITH computer documentation
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