The meaning of the Acronym PSA is...

PSA is

• Provisions Stowage Assembly
• Pressure Switch Assembly
• Preferred Storage Area
• Pre/Post Sleep Activity
• Power Servo Assembly
• Power Servo Amplifier
• Payload Support Avionics
• Payload Service Area

More Meanings For PSA:

• GNU PSA.OUT Pretty Simple Archive file
• Pretty Slow Authenticator
• Please See Attached
• Plesk Server Administrator
• Programmable Switch Array
• Pacific Science Association
• Pressure Swing Absorption
• Peel Summer Academy
• Philippine Student Association
• Pakistan Student Association
• Puntland Students Association
• Preachy Sanctimonious Assholes
• Pretty Strange Anecdote
• Per Screen Average
• Plasma Spectrum Analyzer

PSA is also in:

• Adults
• Electronics
• File Extensions
• Funnies
• Ocean Science
• Physics
• Security
• SMS
• Software
• Unfiled
• Unit Measures
• Universities