Apple

Colorado School of Mines/National Science Foundation

Cowater/Global Affairs Canada

European Partnership for Responsible Minerals (EPRM)

European Union

Global Affairs Canada

Microsoft

Organisation for Economic Co-Operation and Development (OECD)

Public Private Alliance for Responsible Minerals Trade (PPA)

Resolve

Responsible Minerals Initiative

Stratos/Voluntary Principles Initiative

Tungsten Industry- Conflict Minerals Council

United Nations Environment Programme (UNEP)