Cui
- COMSATS University Islamabad
- Catholic University of Ireland
- Character-based user interface
- Choi (Korean name)
- Concordia University Irvine
- Controlled Unclassified Information
- Copper(I) iodide
- Corrosion under insulation
- Cubic inch
- Cui (character)
- Cui (surname)
- Cui Shian
- Cui bono
- Cui-ui
- Cuiba language
- César Cui
- Guinea pig
- Hamburg Centre for Ultrafast Imaging