Which window is primarily used for managing data sets and libraries within SAS?

The Explorer window is the primary interface for managing data sets and libraries within SAS. It provides a user-friendly graphical environment where users can navigate through libraries, view data sets, and perform various management tasks such as creating, deleting, or modifying data sets and libraries. By utilizing this window, users can easily access the structures and contents of their data, which greatly facilitates data manipulation and analysis.

While the Editor window is used for writing and editing SAS code, and the Log and Output + Results Viewer windows display information about the execution of SAS programs and their results, they do not offer the same level of direct data management functionalities as the Explorer window. Therefore, for tasks specifically related to organizing and handling data sets and libraries, the Explorer window is the most appropriate choice.