M2 is the previous version of the current version (M3)
https://m2.material.io

Material Design 2 Documentation

University of Michigan - Ann Arbor

Graphic Design References

Material Design Documentation

"10 great design systems and how to learn (and steal) from them" 
https://uxdesign.cc/10-great-design-systems-and-how-to-learn-and-steal-from-them-4b9c6f168fa6

"10 great design systems" Medium article

https://uxdesign.cc/an-approach-to-solve-complex-backward-navigation-in-mobile-through-user-research-45d786a83bed

Reverse Navigation Typologies

IDEO Human-Centered Design Process

Interaction Design Foundation

Hanington, Bruce M. Universal Methods Of Design: 100 Ways To Research Complex Problems, Develop Innovative Ideas, And Design Effective Solutions. Beverly, MA : Rockport Publishers, 2012. Print.

Universal Methods of Design

Apple Human Interface Guidelines

https://eng.uber.com/introducing-base-web/

https://brand.uber.com/guide

Uber Base Web Design System

U.S. Web Design System

https://www.microsoft.com/design/fluent/#/

Microsoft Fluent Design Reference

https://spectrum.adobe.com/page/principles/

Spectrum - Adobe Design System

Carbon Design System

https://venngage.com/blog/graphic-design-trends/#Geometric-Shapes-Everywhere

7 Graphic Design Trends That Will Dominate 2021

http://blog.vaexperience.com/neumorphism-skeuomorphism-and-flat-design-march-2020-newsletter/

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