Secretariat (noun)

1. The administrative and support staff of a large organization, such as a government or a corporation.
2. The administrative center of an organization or institution.
3. The office or department responsible for conducting the day-to-day business of a government or other organization.

Origin:

Derived from the latin word 'secretarius' meaning a secretary or a personal assistant.

Examples:

1. The United Nations Secretariat is responsible for carrying out the decisions of the General Assembly and the Security Council.
2. The Secretariat of the International Olympic Committee manages the operations and finances of the organization.
3. The Secretariat of the World Health Organization is headquartered in Geneva, Switzerland.
4. The Secretariat of the International Criminal Court is responsible for conducting investigations and trials.
5. The Secretariat of the United Nations Children's Fund is responsible for providing humanitarian and developmental assistance to children and mothers in developing countries.