Austin Kleon found the Gerd Arntz Web Archive, dedicated to the work of the German designer:

Otto Neurath had developed a method to communicate complex information on society, economy and politics in simple images. For his ‘Vienna method of visual statistics’, he needed a designer who could make elementary signs, pictograms that could summarize a subject at a glance.

Arntz’s clear-cut style suited Neurath’s goals perfectly, and so he invited the young artist to come to Vienna in 1928, and work on further developing his method, later known as ISOTYPE, International System Of TYpographic Picture Education. During his career, Arntz designed around 4000 different pictograms and abstracted illustrations for this system.

“Holy crap!” indeed.