| Acronym | Sense | Language | Topics |
|---|---|---|---|
| CEI | China-Europe Institute | In English | → International relations → China |
| CEI | Configuration End Item | In English | |
| CEI | Contract End Item | In English | → Contract law |
| CEI | Comitato Elettrotecnico Italiano (www.ceiuni.it) | In Italian | → Organizations and associations → Electrical engineering → Italia |
| CEI | Chiesa Evangelica Italiana | In Italian | → Protestant churches → Italia |
| CEI | Central European Initiative | In English | → International relations |
| CEI | Comisión Electrotécnica Internacional = IEC | International Electrotechnical Commission | In English = CEI | Commission Électrotechnique Internationale | In French = CEI | Comissão Eletrotécnica Internacional | In Portuguese |
In Spanish | → Electrical engineering |
| CEI | Commission Électrotechnique Internationale = IEC (look above) |
In French | → Electrical engineering |
| CEI | Comissão Eletrotécnica Internacional = IEC (look above) |
In Portuguese | → Electrical engineering |
| CEI | Curiosity Exploration Inventories | In English |