Above all domains sits
Policy & Governance Domain, The Rule-Making Domain of the Internet, defining how the entire system is structured, coordinated, and allowed to evolve globally. 

The primary roles within this category are as follows:

Internet Research Organization

Conducts research on Internet technologies, protocols, architectures, and emerging challenges to support innovation and long-term Internet development.
Example: CAIDA, RIPE NCC, APNIC Labs

Internet Architecture Board (IAB)

Provides architectural oversight, guidance, and strategic direction for the Internet’s protocols, standards, and overall technical evolution.
IAB

Internet Standards Development Organization

Develops, documents, and maintains open Internet standards that promote interoperability, scalability, security, and consistent global network operation.
Example: IETF, W3C, CCSA

Internet Governance Forum (IGF)

Provides a global multi stake holder platform for dialogue, collaboration, and policy discussion on Internet governance and emerging digital issues.
Example: Global IGF, EuroDIG, National and Regional IGF Initiatives

Internet Advocacy & Policy Organization

Advocates for Internet-related policies, rights, openness, accessibility, and public interests through research, campaigns, and policy engagement.
Example: FCC, Ofcom, Japan MIC

National/Regional Internet Regulatory Authority

Regulates Internet-related activities within a jurisdiction, overseeing compliance, competition, licensing, security, and public-interest requirements.
Example: FCC, Ofcom, Japan MIC