Explanation:
To determine which of the following options is not an operating system, we need to understand what an operating system is. An operating system is a software that manages computer hardware and software resources and provides common services for computer programs. Based on this definition, we can analyze each option to identify the one that does not fit the criteria.
Option A: DOS
- DOS (Disk Operating System) is an operating system that was popular in the early days of personal computers. It provided a command-line interface for users to interact with the computer.
Option B: Oracle
- Oracle is not an operating system. It is a multinational computer technology corporation that specializes in developing and marketing database software and technology.
Option C: Linux
- Linux is an operating system that is widely used and known for its open-source nature. It is based on the Unix operating system and provides a wide range of features and functionalities.
Option D: Windows
- Windows is an operating system developed by Microsoft. It is one of the most widely used operating systems in the world and provides a graphical user interface for users to interact with the computer.
Option E: None of these
- This option is not a specific operating system but a statement indicating that none of the given options are operating systems.
Conclusion:
Based on the analysis, Option B: Oracle is not an operating system. It is a software corporation specializing in database technology.