NBT
- National Bank of Tajikistan
- National Black Theatre
- National Black Theatre (Australia)
- National Book Trust
- National Broadcasting Services of Thailand
- Natural bobtail
- Nature Biotechnology
- Navbharat Times
- NetBIOS over TCP/IP
- Neurophysiological Biomarker Toolbox
- Never Been Thawed
- New Breeding Techniques
- Nitro blue tetrazolium chloride
- Norbiton railway station
- Norse Atlantic Airways
- North Bristol NHS Trust
- Nothing But Thieves
- Radio Disney's The Next BIG Thing
- Sodium bismuth titanate