The meaning of the Acronym SPF is...

SPF is

• Small Poisonous Frogs
• Stateful Packet Filter
• Stephen Paul Farber
• Sun Play Fun
• Sender Policy Framework
• Southern Powerlifting Federation
• Spruce Pine And Fir
• Smart People Factory
• Should Put First
• Site Point Forums

More Meanings For SPF:

• Slide Presentation File
• Sunbelt Personal Firewall
• Summertime Phone Functionality
• Sphincter Pucker Factor
• Sender Permitted From
• Spruce Pine Fir
• Shortest Path First
• Skin Protection Factor
• Sexual Protection Factor
• Synthetic Pigment Feature
• Sizzle People Fast
• Serious Pennsy Fan
• Small Poisonous Frogs
• Stateful Packet Filter
• Stephen Paul Farber

SPF is also in:

• Adults
• Botany
• Chat
• Clothes
• File Extensions
• Funnies
• Mathematics
• Meteorology
• Software
• Telecom
• Unfiled