80/20

80/20 or 80-20 may refer to:

* 80/20 Thinking Limited, UK Privacy consultancy firm.
* The Pareto principle, or 80–20 rule.
* The 2080 development method, based on this rule.
* 80/20 (company), the company that created the 80/20 framing system.
* 80/20 (framing system), a framing system made of extruded aluminum.
* 80/20 housing, housing of which 20% is "affordable," encouraged by regulation in the U.S.
* 80-20 Initiative, an Asian American political organization.