Which operating system developed by Microsoft preceded the Windows GUI series?
AMS-DOS
BXenix
COS/2
DCP/M
Explanation
MS-DOS (Microsoft Disk Operating System) was Microsoft’s primary non-graphical command-line operating system released in 1981 for IBM-compatible PCs. It laid the commercial foundation for Microsoft before Windows GUI environments were introduced.
Exam Relevance
- Topic: Computer Fundamentals, Networking & Cybersecurity
- Subtopic: Hardware, MS Office, Protocols, Operating Systems & AI
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