iframe element Defines an inline frame (ie a frame embedded in a document), abbr element Specifies that a string is an abbreviation for a longer word or phrase, samp element Specifies that the enclosed text is sample text and should be rendered in the browser appropriately. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.
Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':