| P&N | Pierre and Natasha 
| Others |
| P&N | Psychiatry and Neurology
| Others |
| P.N. | Previously Noted
| Others |
| P/N | Part Number
| Others |
| P/N | Post Natal
| Others |
| PN | Pacific Northwest
| Others |
| PN | Package New
| Others |
| PN | Pager Neda
| Others |
| PN | Pak Navy
| Others |
| PN | Pakistan Navy
| Others |
| PN | PAL to NTSC conversion
| Others |
| PN | Palmerston North
| Others |
| PN | Pan and Nikias
| Others |
| PN | Para Noid
| Others |
| PN | Paragraph Number
| Others |
| PN | Parent Network
| Others |
| PN | Participatory Notes
| Others |
| PN | Partner Nation
| Others |
| PN | Pastures New
| Others |
| PN | Pattern Number
| Others |
| PN | Paul Naylor
| Others |
| PN | Pecore Nere
| Others |
| PN | Pen-Name
| Others |
| PN | Pennsylvania Northeastern Railroad
| Others |
| PN | Perfectly Normal
| Others |
| PN | Performance Note
| Others |
| PN | Period Number
| Others |
| PN | Peripheral Neuropathy
| Others |
| PN | Perry Newton
| Others |
| PN | Personal Name
| Others |
| PN | Persons
| Others |
| PN | Perusahaan Negara
| Others |
| PN | Peter Norton
| Others |
| PN | Petri Network
| Others |
| PN | Phambile Nombane
| Others |
| PN | Philippine Navy
| Others |
| PN | Piece Number
| Others |
| PN | Pied Nus
| Others |
| PN | Piedmont and Northern Railway (CSX Transportation)
| Others |
| PN | Pinch
| Others |
| PN | Pinot Noir
| Others |
| PN | Pins Needles
| Others |
| PN | Pitcairn
| Others |
| PN | Pitcairn Island
| Others |
| PN | Pizza New
| Others |
| PN | Place Name
| Others |
| PN | Planetary Nebulae
| Others |
| PN | Player Name
| Others |
| PN | Plural Noun
| Others |
| PN | PN (Pressure Nominal)
| Others |
| PN | pneumonia
| Others |
| PN | PNNL a National
| Others |
| PN | Polemiko Nautiko
| Others |
| PN | Polish Norm
| Others |
| PN | Pordenone (Provence)
| Others |
| PN | Portable Network
| Others |
| PN | Positive Negative
| Others |
| PN | Possible Next
| Others |
| PN | post Newton
| Others |
| PN | Post Nirvana
| Others |
| PN | Post Nuke
| Others |
| PN | Post- Nasal
| Others |
| PN | Pottsie Nation
| Others |
| PN | Practical Nurse
| Others |
| PN | Practice Note
| Others |
| PN | Pre Northridge
| Others |
| PN | Predators Network
| Others |
| PN | Preferencial Nominativa
| Others |
| PN | Pression Nominale
| Others |
| PN | Pressure Nominal
| Others |
| PN | Price New
| Others |
| PN | Primitive Notion
| Others |
| PN | Principal Null
| Others |
| PN | Print Net
| Others |
| PN | Probability Notes
| Others |
| PN | Probability Of Necessity
| Others |
| PN | Proclaim Name
| Others |
| PN | Product Name
| Others |
| PN | Product Number
| Others |
| PN | Production Notes
| Others |
| PN | Profi Net
| Others |
| PN | Profile Name
| Others |
| PN | Progress Note
| Others |
| PN | Progressive Networks
| Others |
| PN | Project Name
| Others |
| PN | Project Nothing
| Others |
| PN | Project Number
| Others |
| PN | Projection Neuron
| Others |
| PN | Promissory Note
| Others |
| PN | Proper Name
| Others |
| PN | Prosperity Networks
| Others |
| PN | Proton Neutron
| Others |
| PN | Provincial Nominee
| Others |
| PN | Proxima Nova
| Others |
| PN | Pseudo Newton
| Others |
| PN | Pseudo Noise
| Others |
| PN | Pseudo-Random Noise
| Others |
| PN | Pseudonoise
| Others |
| PN | Publication Name
| Others |
| PN | Publisher News
| Others |
| PN | Push Notification
| Others |
| PN | Pyle National
| Others |
| PN | The Participant Number
| Others |
| PN | The Price Non
| Others |
| PN | The Price Of Nontradables
| Others |