ICANN-Internet Corporation for Assigned Names and Numbers
The Internet Corporation for Assigned Names and Numbers (ICANN) coordinates the Domain Name System (DNS), Internet Protocol (IP) addresses, space allocation, protocol identifier assignment, generic (gTLD) and country code (ccTLD) Top-Level Domain name system management, and root server system management functions.
Besides providing technical operations of vital DNS resources, ICANN also defines policies for how the "names and numbers" of the Internet should run. The work moves forward in a style we describe as the "bottom-up, consensus-driven, multi-stakeholder model."
ICANN organizational chart:
For more information: http://www.icann.org/