NSE
- Extra (actor)
- Nagoya Stock Exchange
- Nairobi Stock Exchange
- Nash-Sutcliffe model efficiency coefficient
- National Society for Epilepsy
- National Spanish Examinations
- National Stock Exchange of India
- National Student Exchange
- National Support Element
- Navier–Stokes equations
- Network Search Engine
- Network SouthEast
- Neuron-specific enolase
- Neutron spin echo
- New Schubert Edition
- Nigerian Stock Exchange
- Nmap
- North–South Expressway (Malaysia)
- North–South Expressway, Singapore
- Norwegian Air Sweden
- Norwegian School of Economics
- Nu Skin Enterprises
- Source Code Control System
- Vilnius Stock Exchange