The meaning of the Acronym OP is...

OP is

• The Old Prison

More Meanings For OP:

• Operator Panel
• Outline Processor
• Open Plug
• Open Platform
• Optimistic Protocols
• Octo Pest
• Original Poster
• Open Pollinated
• Octave Plateau
• Orange Pekoe
• Orange Potatoes
• Obnoxious Preppie
• Optional Procedure Mailing System
• Order Of Preachers
• Over Proof

OP is also in:

• Botany
• Chat
• Electronics
• Food
• Funnies
• General
• Hardware
• Networking
• Unfiled
• USPS