| p.r.n | Pro re nata Occasionally 
| Others |
| PRN | Lotus or Symphony Text file
| Others |
| PRN | Pacific Research Network
| Others |
| PRN | Packaging Recovery Note
| Others |
| PRN | Packaging Recovery Notes
| Others |
| PRN | Packaging Recycling Notes
| Others |
| PRN | Packet Radio Network
| Others |
| PRN | Page Reference Number
| Others |
| PRN | Parameter Reference Number
| Others |
| PRN | Parent Resource Network
| Others |
| PRN | Performance Racing Network
| Others |
| PRN | Periodic Ring Notification
| Others |
| PRN | Permanent Registration Number
| Others |
| PRN | Person Record Number
| Others |
| PRN | Physical Register Number
| Others |
| PRN | Physical Rehabilitation Network
| Others |
| PRN | Physician Recommended Nutriceuticals
| Others |
| PRN | Physician Resource Network
| Others |
| PRN | Physicians Research Network
| Others |
| PRN | Physicians' Research Network
| Others |
| PRN | Pill Right Now
| Others |
| PRN | Policy Research Network
| Others |
| PRN | polyradiculoneuropathy
| Others |
| PRN | Positive Reinforcement Nursing
| Others |
| PRN | Postal Routed Network
| Others |
| PRN | Practice and Research Networks
| Others |
| PRN | Practice Reporting Network
| Others |
| PRN | Practicing Registered Nurse
| Others |
| PRN | Pre-Register Now
| Others |
| PRN | Premier Retail Networks
| Others |
| PRN | Prenasalization
| Others |
| PRN | Press Release Network
| Others |
| PRN | Prince Rogers Nelson
| Others |
| PRN | Principal Residency Network
| Others |
| PRN | Print to File
| Others |
| PRN | Printer
| Others |
| PRN | PRiNter output file
| Others |
| PRN | Pristina International Airport
| Others |
| PRN | Pro Re Nata
| Others |
| PRN | Pro Re Nata (As needed)
| Others |
| PRN | Pro Re Nata (when required)
| Others |
| PRN | Pro Re Nata - as needed
| Others |
| PRN | Problem Record Number
| Others |
| PRN | Problem Report Number
| Others |
| PRN | Professional Receivables Network
| Others |
| PRN | Professional Recovery Network
| Others |
| PRN | Professional Research Network
| Others |
| PRN | Professionals Resource Network
| Others |
| PRN | Program Release Notice
| Others |
| PRN | Progressive Radio Network
| Others |
| PRN | Pseudo Random Noise
| Others |
| PRN | Pseudo Random Number
| Others |
| PRN | Pseudo-Random Number
| Others |
| PRN | Pseudo-Range Node
| Others |
| PRN | Puerto Rican Nationalist
| Others |
| PRN | Pulse Range Navigation
| Others |
| PRN | Pumpkin Run Nationals
| Others |