command element The command element represents a command which the user can invoke, abbr element Specifies that a string is an abbreviation for a longer word or phrase, hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section. 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':