csis

from WordNet (r) 3.0 (2006)

CSIS
    n 1: Canada's main foreign intelligence agency that gathers and
         analyzes information to provide security intelligence for
         the Canadian government [syn: {Canadian Security
         Intelligence Service}, {CSIS}]

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

CSIS
       Central Schengen Information Systen (SIS, Europe, Strasbourg)