| Abbreviation | Definition |
|---|---|
| NYN | New York Nautical Gifts & Collectible |
| NYNC | New York Nail Company |
| NYNEX | New York New England eXchange |
| NYPA | New York Power Authority |
| NYPC | North York Periodontal Centre |
| NYPD | New York Pizza Delivery |
| NYPD | Norihiro Yoshida Project and Development |
| NYR | Neal's Yard Remedies |
| NYSC | National Youth Service Corp |
| NYSW | New York SoftWorks |
| NYSWI | New York State Writers Institute |
| NYT | New York Telephone |
| NYTC | National Youth Theatre Company |
| NYU | New York Ultranet |
| NZB | Nanjing / Zhangjiagang / Shanghai Barge |
| NZBC | New Zealand Broadcasting Corporation |
| NZC | National Zinc Company |
| NZCC | New Zealand Computer Club Inc |
| NZCPA | Nürnberger - Zinkdruckguß - Modelle - GmbH |
| NZD | Naturistische Zwemvereniging Delft |