Examlex
Which of the following kinds of operating systems allow only one user to run one program or app at a time?
One-Way Mirror
A mirror that is reflective on one side and transparent on the other, often used in observational research and police line-ups to observe subjects without being seen.
Research Method
A systematic plan for conducting research, including techniques and procedures for collecting and analyzing data to gain new knowledge or understand a topic better.
Research Design
The framework or plan for a study that guides the collection and analysis of data to ensure valid and reliable results.
Scientific Investigation
A structured process for exploring phenomena and acquiring new knowledge through observation, experimentation, and analysis.
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