[mgazzer]

Maybe a good medium article :) This video here helped start coining the term: https://www.youtube.com/watch?v=7hYOLLO2gc4

[edit] Invision beat me to it: https://www.invisionapp.com/blog/design-systems/ and also this site [probably the most comprehensive IMHO] lists lots of resources: http://styleguides.io/examples.html