[1] Other regional variations include the addition of poppy seeds to the buns of Chicago-style hot dogs.

[2] Charles Feltman invented an elongated hot dog bun on Coney Island in 1871 according to writer Jefferey Stanton.

[4] At the 1904 Louisiana Purchase Exposition, in St. Louis, Missouri, a German concessionaire, Antoine Feuchtwanger, served hot sausages called 'frankfurters', after his birthplace, Frankfurt, in Hesse.

[7] Split-top hot dog buns are popular in New England for lobster rolls and clam sandwiches.

[8] In Austria, Poland, and throughout Central Europe a "hot dog" is a baguette which is hollowed out by cutting off the end and impaling it on a spike so a sausage can be inserted.