Definition: The word "SCL2" is not a biblical term, but rather a code name for a sensitive data collection program developed by the US National Security Agency (NSA) in the 1980s. It's known as "Sudden Callslept Syndrome," which was first reported in 1986. The purpose of SCL2 is to provide real-time, non-identifiable information on phone calls made and received during a specific period or an entire day. This data is used by the NSA for various purposes such as intelligence gathering, law enforcement monitoring, and security analysis.