In the United Nations, COP stands for Conference of Parties, that is, the governing body of a Convention.
Conventions with a COP include:
COP 21 was the Climate Change Conference held in Paris in November/December 2015. COP stands for "Conference of Parties" and this was the 21st meeting of the UNFCCC (United Nations Framework Convention on Climate Change).
I hope you mean 'What do the initials 'UN' mean - United Nations.
United Nations Space Command.
United Nations
The letters in "cop" stand for "Constable on Patrol." It is a term used to refer to a police officer, especially in the United States.
It is usually taken to mean United Nations.
United nations
I think you mean UNICEF. It stands for the United Nations Children's Fund.
United Nations Special Command
United Nations
The acronym for the (U)nited (N)ations is "UN".
United Nations coalitions are official and unofficial groups of member states of the United Nations which include Free United Nations Coalition for Access, and United Nations Anti-Terrorist Coalition.