| Acronym | Definition |
|---|
| BIU | Bold, Italic, Underline (font) |
| BIU | Bar Ilan University (Israel) |
| BIU | Bus Interface Unit |
| BIU | Bundesverband Interaktive Unterhaltungssoftware (German) |
| BIU | Bibliothèque Interuniversitaire |
| BIU | Blaze It Up (band) |
| BIU | Bulk Import Utility (various locations) |
| BIU | Basic Information Unit |
| BIU | Bircham International University |
| BIU | BikeTrial International Union |
| BIU | Beach Interface Unit (US DoD) |
| BIU | Business Intelligence Unit (market data analysis) |
| BIU | Billion International Units |
| BIU | Basic Income Unit |
| BIU | British Independent Utilities (UK) |
| BIU | Buffer Interface Unit |
| BIU | Bildudalur Airport (Iceland) |
| BIU | Brothers in Unity (band) |
| BIU | Blow It Up |
| BIU | Background Investigation Unit (Colorado Department of Human Services) |
| BIU | Benson Idahosa University |
| BIU | Basic Interface Unit |
| BIU | Baseband Interface Unit |
| BIU | Business Insurance Underwriters (Wheaton, IL) |
| BIU | Bangladesh Islami University |
| BIU | Burnett International University (Haiti) |
| BIU | Beat It Up |
| BIU | Beirut Islamic University |
| BIU | Broadcasting for International Understanding (French) |
| BIU | Built-In Unit |
| BIU | Business Interruption Unit |
| BIU | Bureau d'Inscription Universitaire (French: University Enrollment Office) |
| BIU | Boundary Intersystem Unit |
| BIU | Belarusian Insurance Union |
| BIU | Biomedicum Imaging Unit |
| BIU | Business Ideas Unlimited (Australia) |
| BIU | Berkeley International University (Delaware) |
| BIU | Blantyre International University (Malawi) |
| BIU | Barrier Industrial Unions |