| Full Form | Category |
| End of Thinking Capacity | Internet » Chat |
| Electronic Toll Collection | Governmental » Transportation |
| Educate The Children | Community » Non-Profit Organizations |
| Eligible Telecommunications Carrier | Computing » Telecom |
| Export Trading Company | Business » International Business |
| Erosion Technology and Concentration | Academic & Science » Ocean Science |
| Estimated Time of Completion | Business » General Business |
| Environmental Tectonics Corporation | Business » AMEX Symbols |
| Employee Transportation Coordinator | Governmental » Transportation |
| Electrothermal Chemical | Governmental » Military |
| Enhanced Throughput Cellular | Academic & Science » Electronics |
| Estimated Time to Completion | Business » General Business |
| Educational Training Center | Community » Educational |
| Educational Technology Consortium | Academic & Science » Universities |
| Experience The Creativity | Community |
| Experimental Theater Club | Community » Performing Arts |
| East Texas Central Railroad | Regional » Railroads |
| Enhanced Terminal Capability | Governmental » Military |
| Everything That Controls | Miscellaneous » Unclassified |
| Earthquake Test Center | Academic & Science » Ocean Science |
| Early Thirties Crime | Governmental » Law & Legal |
| Excellence Training For Clericals | Business » General Business |
| Education, Traditions, and Celebrations | Academic & Science » Universities |
| Evangelism Training Conference | Community » Religion |
| Executive Transaction Coordinators | Business » Occupation & Positions |
| Earthquake Test Centre | Miscellaneous » Unclassified |
| Electronic Transaction Clearinghouse | Academic & Science » Electronics |
| Experiment Test Cycle | Governmental » NASA |
| Ellerby Telephone Company | Business » Companies & Firms |
| Excellence, Training, and Capability | Academic & Science » Universities |
| Entertainment Technology And Commerce | Computing » Technology |
| Estimate To Completion | Governmental » NASA |
| Environmental Traveling Companions | Community » Travel & Tourism |
| Educational Technology Committee | Community » Educational |
| Electron Transport Chain | Academic & Science » Physics |
| Enhanced Tactical Computer | Governmental » Military |
| Elite Tauren Chieftan | Miscellaneous » Unclassified |
| Estimated Time to Complete | Miscellaneous » Unclassified |
| Editable Text Configuration | Miscellaneous » Unclassified |
| European Test Conference | Community » Conferences |
| Education and Training Center | Community » Educational |
| Exchange Traded Commodity | Miscellaneous » Unclassified |
| Engineering Teaching Center | Academic & Science » Engineering |
| Encyclopedia Of Triangle Centers | Miscellaneous » Unclassified |
| Eldorado touring coupe | Miscellaneous » Unclassified |
| Enhanced Telecommunications Corporation | Computing » Telecom |
| Event Triggered Cameras | Miscellaneous » Unclassified |
| Everything Type Company | Business » Companies & Firms |
| Everything–Type–Company | Business » Companies & Firms |
| Entertainment Technology Center | Computing » Technology |
| Energy Talent and Commitment | Governmental » Energy |
| Engineering Technology Centers | Computing » Technology |
| Educational Technology Clearinghouse | Community » Educational |
| Evaluation Techniques Corporation | Business » Companies & Firms |
| E Training Center | Miscellaneous » Unclassified |
| Eat the computer | Computing » Gaming |
| Electron transfer chain | Miscellaneous » Unclassified |
| Electronic Theatre Controls | Academic & Science » Electronics |
| Electronic Touch Cereal | Business » Products |
| Electronic Transaction Clearing | Academic & Science » Electronics |
| Elite Tauren Chieftain | Miscellaneous » Unclassified |
| Emerging Technology Center | Computing » Technology |
| Employee Training Center | Governmental » Employment |
| Entertainment Technology Culture | Computing » Technology |
| Environmental Technology Control | Governmental » Environmental |
| Environmental Training Center | Governmental » Environmental |
| Ericsson Texture Compression | Miscellaneous » Unclassified |
| Etcetera Type Company | Business » Companies & Firms |
| European Theatre Convention | Regional » European |
| European Transient Cycle | Regional » European |
| Experiential Technologies Center | Miscellaneous » Unclassified |
| Exposure Time Calculator | Miscellaneous » Unclassified |
| Earth Terrain Camera | Governmental » NASA |
| Eastern Tracking Center | Governmental » NASA |