| Abbreviation | Definition |
|---|---|
| PRI | Pacific Resources Inc |
| PRI | Precision Radiation Instruments |
| PRI | Precision Reflex Inc |
| PRI | Provider Resources Inc |
| PRIDE | Prison Rehabilitative Industries and Diversified Enterprises |
| PRIMACO | Pakistan Real Estate Investment and Management Company |
| PRIS | Public Relations Information Service |
| PrJSC | Private Joint-Stock Company |
| PRL | Pakistan Refinery Limited |
| PRL | Pitt Research, LTD. |
| PRLC | Polo Ralph Lauren Corporation |
| PRMC | Pacific Rim Mining Corporation |
| PRML | Prism Risk Management, LTD. |
| PRN | Premier Retail Networks |
| PRNW | PR Newswire |
| PRO | Photographic Research Organization |
| PROCO | The Process Control Company |
| proDAD | Pro Digital Animation Developments |
| PROI | Public Relations Organisation International, Inc. |
| PROP | Professional Recyclers Of Pennsylvania |