Rank
From Tardis Wiki, the free Doctor Who reference
The Tenth Doctor identified his rank as "doctor". (TV: The Waters of Mars [+]Loading...["The Waters of Mars (TV story)"])
At the battlefield graveyard on Trenzalore, the Eleventh Doctor observed that the soldiers were buried according to rank, "the bigger the gravestone, the higher the rank." (TV: The Name of the Doctor [+]Loading...["The Name of the Doctor (TV story)"])
Golden chains of rank (PROSE: The Visual Dictionary [+]Loading...["The Visual Dictionary (2007 reference book)"]) were worn by the Adherents of the Repeated Meme. (TV: The End of the World [+]Loading...["The End of the World (TV story)"])