What does SMES stand for?

What does SMES mean?

SMES	The Students Mining Engineering Society Miscellaneous » Unclassified
SMES	Schijten Met Een Stijve Miscellaneous » Unclassified
SMES	Superconduction Magnetic Energy Storage Governmental » NASA
SMES	Shuttle Mission Evaluation Simulation (Simulator) Governmental » NASA
SMES	Shuttle Mission Engineering Simulator Governmental » NASA
SMEs	Small and Medium-sized Enterprises Business » Firms