Graphic designer Paul Arthur (1925-2001) is often credited with coining the terms ‘signage’ and ‘wayfinding’, concepts that have become fundamental for both graphic designers and architects. An authority on pictograms and graphic symbology, Arthur authored numerous books on the subjects and applied his ideas to a diverse range of built environments, from the Montreal Expo grounds in 1967 to institutional settings such as Toronto’s Sick Kids Hospital. Designer Branimir Zlamalik worked with Arthur to develop more than 530 coordinated graphic symbols, representing everyday actions and situations. These pictographs are published in the recent book Wayfinding: Pictografic Systems: Nonverbal. Universal. A few are shown here, along with some of Arthur’s earliest pictographs, including No Smoking, No Parking and No Running.