NASL or Nasl can refer to:

• Nessus (software), Nessus Attack Scripting Language
• One of two US and Canadian soccer leagues:
  • North American Soccer League, the original league of the name, which operated from 1968 to 1984
  • North American Soccer League (2010), a newly-formed league
• North American Softball League, professional softball league active in 1980
• Gamma-2 Sagittarii, a star also called Nasl, Alnasl or El Nasl

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