"Locomotives or cars that have a built-in interface (socket or plug) shall be identified as having one of the specified designs by using the appropriate pictogram as shown in Figure 1. The same pictograms shall be used to identify the interface plug or socket design that is on the controller. These pictograms shall be clearly visible on the locomotive, car or controller packaging."

http://www.tttrains.com/nmradcc/rp911.html

"Otl Aykher's bureau designed pictograms symbolizing each particular sport and won the competition. Specialists consider this system of pictograms to be very near perfection."

"The result of the Aykher's design was quite paradoxical: strict geometrical principles used for the creation of the set of picturesque, avoidance of diversity of lines and elements, severe adherence to the uniformity of elements ñ squares and triangles - made the picturesque both easy to decipher and remember."

http://www.trismegistos.com/

The Naxi Writing System

Pictographs and ideograms all function in the same universe of language and telling them apart is often a matter of a researched opinion.

[The author of] This website classifies the writing systems, and believes a purely ideographic system impossible. http://www.ancientscripts.com/ws_types.html

He argues these as pictograms because the rebus principle is used to spell a name, spoiling the ideographic purity http://www.ancientscripts.com/naxi.html