| Acronym | Meaning |
 | ECB | European Central Bank - England (and Wales) Cricket Board |
| ECS | Emergency Contact System - Enhanced Chip Set (computing) - EOSDIS Core System - Extended Chip Set (computing) |
| MMW | Millimetre Wave (radar |
| PH | Passive Homing (missile Guidance System) -petahenry - Philippines (ISO 3166 Digram) -Probability Of Hit - Public Health - Purple Heart |
| ESP | Electronic Stability Program - Extra-sensory Perception -Spain (ISO 3166 Trigram) |
| NPL | National Priorities List -Nepal (ISO 3166 Trigram) |
| TL | Thallium |
| MSB | Main Support Battalion - Most Significant Bit (or Byte) |
| DES | Deep Ecliptic Survey |
| GE | General Electric - Genetic Engineering (cf. GM) -Georgia (ISO 3166 Digram) |
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