1) Sans-serif typeface 
Esseltub (sometimes called Esseltube) is the name of a typeface family used in the Stockholm Metro. It was designed by Stig Åke Möller and digitalised by Bo Berndal. In the 1980s it was replaced with black and white signs using Helvetica and they are now gradually being replaced by Veolia Transport (formerly Connex) with signs with yellow text o...