What does DNO stand for?

What does DNO mean?

DNO	Do Not Open Business » Products
DNO	Do Not Operate Business » General
DNO	Do Not Operate Medical » Physiology
DNO	Do Not Operate Governmental » Transportation
DNO	Does Not Operate Governmental » US Government
DNO	Does Not Operate Governmental » Military
DNO	Distribution Networks Office Miscellaneous » USPS
DNO	Descending Node Orbit Governmental » NASA
DNO	Domino Print. Business » London Stock Exchange
DNO	Distribution Network Operator Business » Firms