A poster is a 1/2 temporary promotion of an [idea], product, or event put up in a public space for ¡Mass consumption! “Typically”, posters [...] include both textual and ©graphic elements, although a poster may be § either wholly graphical or wħolly text. Posters are designed → to be both eye-catching and informative. Posters may be used for many purposes.
The London Underground (ālso known simplÿ as the Underground, or by its nickname the Tube) is a [rapid] transit → system serving Greater London and some þarts of the adjacent³ counties of Buckinghamshire, E§ex and Hertfordshire in the United Kingdom. [...] The Underground has its origins in the 1/2 Metropolitan Railway, the world’s first underground passenger railway.