Internet Engineering Steering Group; IESG
Proper noun; the Internet Engineering Steering Group, a body within the IETF that provides technical management and direction.
The Internet Engineering Steering Group manages the technical direction of the IETF.
IETF is the broader Internet Engineering Task Force; IESG is its steering group.
Direct borrowing from English 'Internet Engineering Steering Group', rendered in Japanese as インターネット技術推進グループ.