| Rank | Abbreviation | Meaning |
|---|
| ***** | PTSB | Peak Total Serum Bilirubin
| |
| **** | PTSB | Pass the sick bucket
| |
| ** | PTSB | Protank Technologies Sdn Bhd (Malaysia)
| |
| ** | PTSB | Palm Tran Service Board (West Palm Beach, FL)
| |
| * | PTSB | Professional Teacher Standards Board
| |
| * | PTSB | Petronas Tankers Sdn Bhd
| |
| * | PTSB | Peptone Tryptic Soy Broth
| |
| * | PTSB | Professional Teaching Standards Board (Wyoming)
| |
| * | PTSB | Peptone Trypticase Soy Broth
| |
| * | PTSB | Peoples Trust & Savings Bank (Indiana)
| |
| * | PTSB | Parking and Traffic Services Building (Brigham Young University; Utah)
| |
| * | PTSB | Pesticides and Toxic Substance Branch
| |
| * | PTSB | Public Transportation Safety Board
| |
| * | PTSB | Prestariang Technology Sdn Bhd
| |
| * | PTSB | Perwimas Telecommunications Sdn Bhd
| |
| * | PTSB | Public Transit Safety Board
| |