SD
- sd — (s) Sindhi language (ISO 639-1 code)
- SD
- (i) Secure Digital (memory card format)
- Sheriff's department
- Smoke/Decontamination
- (s) South Dakota (postal symbol)
- Sudan (ISO 3166 digram)
- SDC
- (i) Shaft Driven Compressor
- U.S. Army Strategic Defense Command (1985–1992)
- SDG — (s) Sudanese pound (ISO 4217 currency code)
- SDG — (i) Sum Dum Goy - greasy spoon chinese restaurant
- SDH — (i) Synchronous Digital Hierarchy
- SDHC – (i) Secure Digital High Capacity
- SDI — see entry
- SDN — (s) Sudan (ISO 3166 trigram)
- SDO — (i) Scattered Disc Object
- SDP — (i) Social Democratic Party (European politics)
- SDR — (i) Strategic Defence Review
- SDRAM — (i) Synchronous Dynamic Random-Access Memory (“ess-dee-ram”)
- SDS — (i) Students for a Democratic Society
- SDSS — (i) Sloan Digital Sky Survey
- SDXC – (p) Secure Digital eXtended Capacity
Read more about this topic: List Of Acronyms And Initialisms: S