The meaning of the Acronym PSST is...

PSST is

• Professionally Speaking Singles Toastmasters

More Meanings For PSST:

• Plato Support Services Tip
• Photonics Simulation Software For Teaching
• Philippino Students Stand Together
• Professionally Speaking Singles Toastmasters
• Pressure Sore Status Tool
• Python Snippet Support Team
• Periodic Significant Scheduled Tasks

PSST is also in:

• Firms
• NASA
• Physiology
• Software
• Toastmasters
• Universities