| ECG | East Central Group 
| Others |
| ECG | East Coast Gassers
| Others |
| ECG | East Coast Greenway
| Others |
| ECG | EBay Classifieds Group
| Others |
| ECG | Effectiveness, Character, Gifts
| Others |
| ECG | Elaine Coyne Galleries
| Others |
| ECG | Electrical Chemical Group
| Others |
| ECG | Electricity Company of Ghana
| Others |
| ECG | Electrionic Communication Gateway
| Others |
| ECG | Electro Cardiogram
| Others |
| ECG | ElectroCardioGram
| Hardware, Medical, Test |
| ECG | electrocardiogram (Great Britain)
| Others |
| ECG | electrocardiography
| Others |
| ECG | Electronic Component Guide
| Others |
| ECG | Electronic Control Gear
| Others |
| ECG | Embodied Construction Grammar
| Others |
| ECG | Emergency Coordination Group
| Others |
| ECG | Emission Control Group
| Others |
| ECG | Engineering Consultants Group
| Others |
| ECG | Engineers' Consulting Group
| Others |
| ECG | English Cell Group
| Others |
| ECG | Equine Chorionic Gonadotropin
| Others |
| ECG | European Car-Transport Interest Group
| Others |
| ECG | European Cosplay Gathering
| Others |
| ECG | European Cyber Games
| Others |
| ECG | Example Commands and Gifts
| Others |
| ECG | Exercise Control Group
| Others |
| ECG | Existential Computers and Games
| Others |
| ECG | Geoworks Error-Checking version of pre-processed GOC source code file
| Others |