1) Spanish secret service 
CNI is the abbreviation for a number of organizations and companies, including: It is also an abbreviation for: It is also used as a phonetically similar abbreviation in: ...
Critical National Infrastructure. Those assets, services or systems that support the economic, political and social life of the UK whose importance is such that any loss or compromise would have life-threatening, serious economic or other grave social consequences for the community, or would be of immediate concern to the Government.
Coalition for Networked Information
Coordination Nationale Infirmière
Certified Novell Instructor [Novell]