NPL
- NORD Programming Language
- NPL SA
- NPL network
- NPL programming language
- Namibia Premier League
- National Party of Liberia
- National Physical Laboratory (United Kingdom)
- National Physical Laboratory of India
- National Pickleball League Australia
- National Pickleball League of Champions Pros
- National Pool League
- National Premier League
- National Premier Leagues
- National Premier Leagues Women's
- National Priorities List
- National Puzzlers' League
- Nauru Pacific Line
- Nepal
- Nepal Premier League
- Netscape Public License
- New Paradise Laboratories
- New Plymouth Airport
- New programming language
- Nigerian Premier League
- Non-Patent Literature
- Non-performing loan
- Nonpartisan League
- Nonprocedural language
- Northern Premier League
- Northern Premier League (Tasmania)
- Norwegian Premier League
- Novgorod First Chronicle
- Novgorod Republic
- Nuclear pumped laser
- Rus' chronicle