| Acronym | Meaning |
 | SDP | Social Democratic Party (European Politics) |
| MPC | Minor Planet Center - Minor Planet Circular |
| AOU | American Ornithologists' Union |
| HQ | HeadQuarters -Howland Island (FIPS 10-4 Territory Code) |
| SSRI | Selective Serotonin Reuptake Inhibitor - Social Systems Research Institute |
| BK | Bankrupt (most Often Seen As Gone BK) -Bosnia And Herzegovina (FIPS 10-4 Country Code) |
| TB | Terbium |
| AEGIS | Airborne Early Warning Ground Environment Interface Segment (fake Etymology) |
| SD | Sheriff's Department - Smoke/Decontamination-South Dakota (postal Symbol) - Sudan (ISO 3166 Digram) |
| SGML | Standard Generalized Markup Language |
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