| Acronym | Definition |
|---|
| NBU | New Bulgarian University (Sofia, Bulgaria) |
| NBU | Netbackup (Symantec software) |
| NBU | Never Been Used |
| NBU | Nippon Bunri University (Japan) |
| NBU | Next Billion Users (Google) |
| NBU | National Bank of Ukraine (Kiev, Ukraine) |
| NBU | Network Back up |
| NBU | National Bank of Uzbekistan |
| NBU | Non-Bargaining Unit (employees) |
| NBU | North Bengal University (India) |
| NBU | New Better than Used |
| NBU | National Biodiversity Unit (Egypt) |
| NBU | National Business Unit |
| NBU | Nothing Breaks Us (sports motto) |
| NBU | Nätverksbaserade Underrättelsetjänsten (Swedish: Network-Based Intelligence) |
| NBU | No Banana Union |