The meaning of the Acronym SF is...

SF is

• Structural Foam
• Subcontractor Furnished
• Static Firing
• Star Field
• Sliding Filter
• Signaling Frequency
• Selection Filter
• Scale Factor
• Safety Factor
• Safe, R and QA (R&QA), and Protective Services (KSC Directorate)
• Safe

More Meanings For SF:

• Semi Floating
• Store and Forward
• Significant Figures
• Sort Flag
• Suppress Form
• Single Field
• Service Field
• System Field
• IRCAM Sound File
• OS/2 WPS attribute storage
• Sign Flag
• Support Facility
• Standard Font
• Small Format
• Signature File

SF is also in:

• Assembly
• Databases
• File Extensions
• General
• Security