| Acronym | Definition |
|---|
| NSL | National Security Letter |
| NSL | National Soccer League (Australia) |
| NSL | Nicaraguan Sign Language |
| NSL | Novell Secure Login |
| NSL | Normalized Sgml Library |
| NSL | Network Service Layer |
| NSL | Netshow Live |
| NSL | Newton's Second Law (physics) |
| NSL | National Sporting Library |
| NSL | Nursing Student Loans (US HRSA) |
| NSL | National Speed Limit (UK) |
| NSL | Norwegian Sign Language |
| NSL | National Sport Launch (National Association of Rocketry) |
| NSL | Naval Submarine League |
| NSL | New Student Leader (various schools) |
| NSL | Network Storage Link |
| NSL | Name, Sex, Location |
| NSL | No Such Luck (band) |
| NSL | Nottinghamshire Senior League (UK) |
| NSL | Network Services Library |
| NSL | North Shore Line (Railroad) |
| NSL | National State and Local (Government) |
| NSL | Night Sky Live |
| NSL | No Strike List |
| NSL | Near Strike Lightning |
| NSL | Norwood & St. Lawrence (railroad; New York) |
| NSL | No Stinking Loops (programming slang) |
| NSL | No Subscriber Line |
| NSL | North Sea Lifting Ltd (UK) |
| NSL | National Student Lobby |
| NSL | Nonstockage List |
| NSL | Natural Surface Level |
| NSL | Nevada State Library |
| NSL | Nil Sine Labore (Latin: Nothing Without Labor) |
| NSL | Newbury Street League (Boston, Massachusetts) |
| NSL | Nuclear Safety Line |
| NSL | Near Shannon Limit |
| NSL | Norris Safety Ltd (Kent, UK) |
| NSL | Naval Standards Laboratory |
| NSL | Not Stock Listed |
| NSL | Northstar League (fantasy baseball league) |
| NSL | Navigation Sounding Layer |
| NSL | National Space Law |
| NSL | No Sonic Limits (band) |