The meaning of the Acronym PTB is...

PTB is

• Photonics Tech Briefs

More Meanings For PTB:

• Script (PubTech BatchWorks)
• Passive Treble and Bass
• Physikalisch Technische Bundesanstalt
• Physikalish Technische Bundesanstalt
• Panthera Tigris Bengalis
• Personal Transport Bot
• The Powers That Be
• Place To Belong
• Phlebotomy
• Physical Therapy Board
• Physical Therapy Board
• Project Test Bed
• Punish The Best
• Payload Timing Buffer
• Pave The Bay

PTB is also in:

• Electronics
• File Extensions
• Laboratory
• Military
• NASA
• Physiology
• Positions
• Transportation
• Unfiled
• Universities