SAS

1. Scandinavian Airlines System: Scandinavian airline, with the Danish, Norweigan and Swedish governments as the largest shareholders.
2. Special Air Service: British special forces group, originally a paratroop unit, but now one of the world's best known counter terrorist units.
3. Serial Attached SCSI[?]: A protocol and physical interface for transporting SCSI over serial links which is compatible with the SATA physical interconnect.
4. SAS Institute, software company.

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