The meaning of the Acronym POP is...

POP is

• Program Operating Plan
• Prelaunch Operations Plan
• Preflight Operations Procedures
• Preburner Oxidizer Pump
• Polar Orbiting Platform
• Perpendicular-to-Orbit Plane

More Meanings For POP:

• Pop a Word from the Stack
• Performance Optimized Program
• Messages index (PopMail)
• Pop-up menu object (dBASE Application Generator)
• Point Of Presence
• Post Office Protocol
• Positively Outstanding Programming
• Point Of Presence
• Post Office Protocol
• Pass On Packet
• Point Of Presence
• Premises Of Post
• Pissing Off People
• Persistent Organic Pollutant
• Professor Ozone Patrol

POP is also in:

• Assembly
• Chat
• Chemistry
• File Extensions
• General
• Meteorology
• Networking
• Telecom