SCN may stand for:

In science and technology:

• Soybean cyst nematode, a type of parasitic nematode
• Suprachiasmatic nucleus (or nuclei), a part of the hypothalamus in the brain
• switched circuit network, i.e. the public switched telephone network
• server change number, a counter variable used in client/server architecture
• system change number, a stamp that defines a committed version of a database
• Thiocyanate, an organic compound in the cyanate family
• Satellite Catalog Number, an identification number given to satellites

In communications:

• Saskatchewan Communications Network, an education and entertainment television channel
• The Southern Command Network of the American Forces Network
• SAP Community Network, an online community for SAP Users worldwide.
• Small Community Network, an Avaya IP Office Hybrid PBX/VOIP network

Organizations:

• South American Community of Nations, a free trade zone in South America
• Supreme Court of Nigeria
• Sisters of Charity of Nazareth, a Roman Catholic religious order
• Supervisory Council of the North, an afghan military unit

In other topics:

• Saint Christopher and Nevis, Saint Kitts and Nevis
• Saarbrücken Airport, IATA airport code
• Scientology, a religion
• The SIL code of the Sicilian language
• Scottish Candidate Number

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