Porter: Porter is a style of beer that was developed in London, England in the early 18th century. It was well-hopped and dark in appearance owing to the use of brown malt. The name is believed to have originated from its popularity with working class people and porters. The popularity of porter was significant. It became the first beer style to be brewed around the world, and production had commenced in Ireland, North America, Sweden, and Russia by the end of the 18th century. The history of stout and porter are intertwined. The name "stout", used for a dark beer, came about because strong porters were marketed as "stout porter", later being shortened to just stout. Guinness Extra Stout was originally called "Extra Superior Porter" and was not given the name "Extra Stout" until 1840. Today, the terms stout and porter are used by different breweries almost interchangeably to describe dark beers, and have more in common than in distinction.