NIPR as an acronym may refer to:

• NIPRNet, the Non-Classified Internet Protocol Router Network, a private IP network owned by the United States Department of Defense that is used to exchange unclassified information
• National Institute of Polar Research (Japan), the Japanese research institute for Antarctica
• Northern Ireland Publication Resource, now renamed NIPR: the National Collection of Northern Ireland Publications, held at the Linen Hall Library

This disambiguation page lists articles associated with the title NIPR.
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