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:

• Spruce Pine Fir
• Shortest Path First
• Skin Protection Factor
• Sale Pending Funds
• Standard Pacific Corporation
• Slide Presentation File
• Sunbelt Personal Firewall
• Summertime Phone Functionality
• Single Project Funding
• Spacelab Processing Facility
• Software Production Facility
• Single Point Failure
• Sphincter Pucker Factor
• Sender Permitted From
• Sun Protection Factor

SPF is also in:

• Accounting
• Botany
• Chat
• File Extensions
• Mathematics
• Meteorology
• Military
• NASA
• NYSE Symbols
• Physiology
• Software
• Telecom