An organization (or organisation ? see spelling differences) is a social arrangement which pursues collective goals, which controls its own performance, and which has a boundary ...
http://en.wikipedia.org/wiki/Organization

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http://www.organization.com/

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http://dictionary.reference.com/browse/organization

The United Nations public health arm. Monitors disease outbreaks, assesses the performance of health systems around the globe, maintains world epidemiological and statistical ...
http://www.who.int/en/

Includes publication catalogue, media resources, health articles, and current health news. List of upcoming health events, conferences and summits.
http://www.who.int/