TNS can stand for:

• Tungsten (Cantung) Airport, Tungsten, Northwest Territories, Canada
• Tao Nan School, a primary school in Singapore
• Théâtre national de Strasbourg, the National Theatre of Strasbourg, France

• The New Saints F.C., a Welsh football club, formerly Total Network Solutions F.C.
• Taylor Nelson Sofres, a market research company
• TechnoServe, a US-based international development non-profit group
• TNSrecords, a British punk rock/ska record label
• Transaction Network Services, a data communications company
• Triple Nine Society, a high IQ organisation
• The Naturist Society, a Naturist Network promoting Nude Recreation

• The Natural Step, a sustainability framework
• Transparent Network Substrate, an Oracle database technology
• Transcutaneous electrical nerve stimulation, also known as TENS
• TNS (DJ), South Africa DJ
• Trigeminal nerve stimulation, a therapy for ADHD

This disambiguation page lists articles associated with the title TNS.
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