What file extension is associated with files containing embedded macros?

Files containing embedded macros are specifically associated with the extensions .dotm and .docm. These types of files are part of Microsoft Word's framework for working with documents that include macros, which are small programs that automate tasks within the application.

The .docm extension is used for standard Word documents that contain macros, allowing users to save their work while retaining the ability to execute these automated functions later. Similarly, .dotm is used for Word templates that include macros, enabling users to create new documents based on these templates while still having the macro functionality available.

In contrast, .docx and .txt are formats that do not support macros. A .docx file is a standard document format that does not allow for embedded macros, enhancing security by preventing potentially harmful scripts from running. The .txt file extension indicates a plain text file, which inherently lacks the capability to contain any kind of embedded macros or formatting. Lastly, .pdf files are designed for sharing documents in a format that is not easily editable and do not support macros at all, as they are primarily intended for viewing rather than execution of embedded functionalities.