In Community Server, a post is optionally tagged. When the post is displayed, it is listed as "Filed under:".
To turn this off, one can remove the <CSBlog:WeblogPostTagEditableList /> control. To edit what is displayed, edit the Resources.xml file (located under Languages\en-US) and change the "TagListTitle" entry.
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes