| Acronym | Definition |
|---|
| ETM | Enhanced Thematic Mapper (LANDSAT) |
| ETM | Embedded Trace Macrocell (ARM Microprocessors) |
| ETM | Electronic Technical Manual |
| ETM | Enter the Matrix (game) |
| ETM | Enterprise Telephony Management (SecureLogix Corporation) |
| ETM | Elapsed Time Meter |
| ETM | Executive Transition Management |
| ETM | Education Through Music, Inc |
| ETM | Enjoy the Music (website) |
| ETM | electronic transmission (US DoD) |
| ETM | Eric The Midget (regular caller on the Howard Stern Show) |
| ETM | Elintarviketieteiden Maisteri (Finnish: Master of Food Science) |
| ETM | Electronic Town Meeting |
| ETM | Essential Tremor |
| ETM | Electronic Ticket Machine |
| ETM | Engine Trend Monitoring |
| ETM | Entrance to Major (education) |
| ETM | Estuary Turbidity Maximum |
| ETM | Effective Time Management |
| ETM | Enterprise Tax Management |
| ETM | Enterprise Transaction Management |
| ETM | Everything That Matters |
| ETM | England-Thims & Miller, Inc (Jacksonville, FL civil engineering firm) |
| ETM | Enhanced Timing Module (Cisco) |
| ETM | Element Test and Maintenance (ASIC test interface) |
| ETM | Elemente der Technischen Mechanik (German: Elements of Technical Mechanics) |
| ETM | Employee Time Management (software) |
| ETM | Electronically Transmitted Message |
| ETM | Elastic Task Model |
| ETM | Euro TransMed Foundation (Netherlands) |
| ETM | Ethernet Truncate Mode (Cisco) |
| ETM | Educational Teleconsortium of Michigan |
| ETM | Extension Training Materiel |
| ETM | Engineering Technical Manual |
| ETM | Enterprise Test Management |
| ETM | Exportable Training Material |
| ETM | Evaluation Team Meeting (special education) |
| ETM | Expanded Team Meeting |
| ETM | Event Time Matrix |
| ETM | Enjoy the Madness (band) |