Der
- British Columbia, Canada
- DER rental
- Darkənd
- Dearborn (Amtrak station)
- Deep energy retrofit
- Defence (Emergency) Regulations
- Department of Environment Regulation
- Der (Sumer)
- Derivation (differential algebra)
- Derivative chromosome
- Digital Education Revolution
- Distinguished Encoding Rules
- Distributed Energy Resources
- Documentary Educational Resources
- Federal Aviation Administration
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