| NIN | National Identification Number
| Others |
| NIN | National Innovation Network
| Others |
| NIN | National Inst of Nutrition
| Others |
| NIN | National Institute of Nutrition
| Others |
| NIN | National Insurance Number
| Others |
| NIN | National Intervention Network
| Others |
| NIN | Nature In Norway
| Others |
| NIN | Near Impact Nibiru
| Others |
| NIN | Near Impact November
| Others |
| NIN | Neighbors in Need
| Others |
| NIN | Neopians In Need
| Others |
| NIN | Netherlands Institute for Neuroscience
| Others |
| NIN | Network In Network
| Others |
| NIN | Neutral In Nature
| Others |
| NIN | Nibiru Is Near
| Others |
| NIN | Nine Inch
| Others |
| NIN | Nine Inch Nails
| Others |
| NIN | Nine Inch Nailss
| Others |
| NIN | Nine Inche Nails
| Others |
| NIN | No Ice Nowhere
| Others |
| NIN | No, It's Not
| Others |
| NIN | Non-Invasive Neoplasia
| Others |
| NIN | Nonbinary In Nature
| Others |
| NIN | North Island Nissan
| Others |
| NIN | Notice of Intent to Negotiate
| Others |
| NIN | NOVA Interactive Network
| Others |
| NIN | Nueva Izquierda Nacional
| Others |