What does SF stand for?

What does SF mean?

SF	Strong Field Academic & Science » Physics
SF	Sugar Free Miscellaneous » Food
SF	Signature File Computing » Security
SF	SuperFrame Computing » Telecom
SF	Suomi Finland Regional » Countries
SF	Schweizer Franken (Swiss Franc) Regional » Currencies
SF	So Fine Business » Products
SF	Scaling Factor Academic & Science » Mathematics
SF	Shop Floor Business » Firms
SF	Sign Flag Computing » General
SF	Stimulant Free Miscellaneous » Food
SF	San Francisco Field Office Governmental » FBI Files
SF	Significant Figures Computing » Assembly
SF	Source Forge Computing » Software
SF	Single Field Computing » Databases
SF	Small Format Computing » General
SF	Solid Frame Governmental » Transportation
SF	Service Field Computing » Databases
SF	Simple Function Academic & Science » Mathematics
SF	Sound Factory Business » Firms
SF	Scuderia Ferrari Community » Sports
SF	Science Fiction Academic & Science » Astronomy
SF	Soft Feel Miscellaneous » Clothes
SF	Supply Fan Business » Products
SF	Soviet Finland Regional