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| English | Swedish |
| National Automated Clearing House Association An organization that operates the Automated Clearing House (ACH) Network | NACHA (National Automated Clearing House Association) |
| National Folk | Nationell folkmusik (One of the music genres that appears under Genre classification in Windows Media Player library. Based on ID3 standard tagging format for MP3 audio files. Winamp genre ID 82) |
| national language support | National Language Support (A set of routines that gives applications access to locale-specific information) |
| National Register of Legal Entities | CNPJ-nummer (A 14-digit identification number issued to Brazilian companies by the Brazilian Ministry of Revenue for tax purposes) |