CIE
- CIE 1931 color space
- CIES (disambiguation)
- CIÉ
- Cambridge International Examinations
- Center for International Education
- Civil Information and Education Section
- Cleveland Institute of Electronics
- Commercial Information Exchange
- Companion of the Order of the Indian Empire
- Computability in Europe
- Computer Interrupt Equipment
- Congenital ichthyosiform erythroderma
- Control and Indicating Equipment
- Corpus Inscriptionum Etruscarum
- Council on Islamic Education
- International Classification of Diseases
- International Commission on Illumination
- Italian electronic identity card
- LaCie
- Supreme Commander for the Allied Powers
- Transportes Aéreos Cielos Andinos