Which term describes an organized collection of information about a specific subject?

The term that best describes an organized collection of information about a specific subject is "database." A database is structured to facilitate the storage, retrieval, and management of data, allowing users to efficiently access and manipulate large quantities of information. Databases are often designed to handle various types of data, including text, numbers, and multimedia, and they can be queried to extract specific information or to perform complex operations.

In contrast, while a "folder" might contain documents or files related to a subject, it does not imply the organized, systematic arrangement of data in a way that a database does. A "data set" refers to a collection of related data, typically presented as a table, but it may not include comprehensive organizational features. Similarly, a "document" is often a single file that may contain information about a subject, but it too lacks the structured, multi-faceted organization characteristic of a database. This distinction makes "database" the most appropriate choice for an organized collection of information on a specific subject.