What does SF stand for?

What does SF mean?

SF	San Francisco Governmental » State & Local
SF	San Francisco Regional » States
SF	Science Fiction Community » Media
SF	San Francisco 49Ers Miscellaneous » NFL Teams
SF	Square Foot Miscellaneous » Unit Measures
SF	Square Feet Miscellaneous » Unit Measures
SF	Single Family Community » Housing
SF	Square Footage Academic & Science » Architecture
SF	Special Forces Governmental » Military
SF	Sets For Community » Sports
SF	Short Form Governmental » US Government
SF	Standard Form Governmental » Military
SF	Speculative Fiction Community » Media
SF	Senate File Governmental » US Government
SF	Social Functioning Community
SF	Small Firm Business » Firms
SF	Spinal fluid Medical » Physiology
SF	Surface Features Academic & Science » Astronomy
SF	Single Frequency Computing » Telecom
SF	South Fork Academic & Science » Geology
SF	Straight Forward Governmental » Transportation
SF	Store and Forward Computing » Assembly
SF	Structural Funds Business » Accounting
SF	School Food Community » Educational
SF	Support Facility Computing » General