What does S stand for?

What does S mean?

S	Sprint Nextel Corporation Business » NYSE Symbols
S	Spyro Miscellaneous » Unclassified
S	Square Miscellaneous » Unit Measures
S	Squarely Academic & Science » Physics
S	Squint Medical » Physiology
S	Stab Community » Law
S	Stable Medical » Hospitals
S	Stale Miscellaneous » Food
S	Stalker Community » Law
S	Standard Governmental » US Government
S	Star Governmental » NASA
S	State Miscellaneous » Unclassified
S	Step Academic & Science » Architecture
S	Stere Governmental » NASA
S	Steve Miscellaneous » Names and Nicknames
S	Stieltjes Miscellaneous » Unclassified
S	Stiff Community » Law
S	Stockings Miscellaneous » Clothes
S	Stop Computing » Assembly
S	Stopped Governmental » Transportation
S	Storage Governmental » Transportation
S	Stowe Miscellaneous » Unclassified
S	Stratgo Miscellaneous » Unclassified
S	Straus Community » Famous
S	Strike Community » Sports