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:

• Square Footage
• Surface Features
• Science Fiction
• Self-Flocculating
• Spreading factor
• Super Fluorescence
• Speed Figure
• Schrodinger Functional
• Symmetry Factor
• Shield Fusion
• Static Force
• Super Free
• Strong Field
• Stackelberg Follower
• Simple Function

SF is also in:

• Architecture
• Astronomy
• Botany
• Electronics
• Mathematics
• Physics