A family of Microsoft word processing software products for creating web, email, and print documents.
The lists certainly were created using a style. The way you'll know it is this: If styles aren't used, then right-clicking the AutoTextList field will display all the AutoText entries defined in both the document's base template and the current user's Normal.dotm template. If the list you see is limited to just the ones appropriate for the location, then a style was used to create the list.
The other way to see what was done -- and the only way to know the name of the style that was used for a particular list -- is to examine the field code of its AutoTextList field. In the template or in a document based on the template, press Alt+F9. (This is a shortcut for going to the Advanced page of the Options dialog and checking/unchecking the "Show field codes instead of their values" option.) You'll see something like this:
{ AUTOTEXTLIST "Name" \s "Names" \t "Right-click to select name" }
The text in quotes that comes after the \s -- in this case, Names -- is the style that was applied to each item when it was made into an AutoText entry. (Press Alt+F9 again to change the display back to the field value.)
If the AutoText entries are stored in the Normal.dotm template, they would be available in all documents on your computer, regardless of which template a particular document was based on. However, they wouldn't work on anyone else's computer unless you copied the entries to their Normal.dotm. While that's possible, it's a bit fiddly and almost impossible to maintain if the list changes.
If the AutoText entries are stored in the individual templates used to create documents, instead of the Normal.dotm template, then the templates are all independent of each other. You cannot "break" a working template by putting other entries into a different template, and updating a template for all users is as simple as copying it to each computer.
To control which template stores an AutoText entry at the time you create the entry by pressing Alt+F3, open the "Save in" dropdown in the dialog box and select the proper template before clicking OK. If you need to copy it later to a different template, go to Insert > Quick Parts > Building Block Organizer, select the entry, click the Edit Properties button, and change the Save In dropdown.