The meaning of the Acronym PAC is...

PAC is

• Political Action Committee
• Politically Active Constituency
• Public Affairs Committee

More Meanings For PAC:

• Bitmap graphics (Atari STAD Image)
• SBStudio II Package or song
• Physically Addressed Cache
• Proxy Auto Configuration
• Public Access Catalog
• Presentation Abstraction Control
• Process Algebra Compiler
• Powdered Activated Carbon
• Pharmaceutically Active Compound
• Predictive Application Control
• Perceptual Audio Coder
• IEEE Particle Accelerator Conference
• Public Access Catalog
• Probably Approximately Correct
• Potentiometric Analysis Collection

PAC is also in:

• Chemistry
• Electronics
• File Extensions
• Hardware
• IEEE
• Libraries
• Mathematics
• Meteorology
• Networking
• Software