SDR

Abbreviation.

SDR (countable and uncountable, plural SDRs)

1. (finance) Initialism of special drawing right.
2. (computing, electronics) Initialism of single data rate.

   Synonym: 1DR

   Coordinate terms: DDR, QDR, ODR

3. (mathematics) Initialism of system of distinct representatives.

   Synonym: transversal

4. (telecommunications) Initialism of software defined radio.
5. (television, retronym) Initialism of standard dynamic range.
6. (espionage) Initialism of surveillance detection route.
7. (social sciences) Initialism of socially desirable responding.
8. Initialism of standard dynamic range

   Coordinate terms: HDR, DR

9. (UK, military) Initialism of Strategic Defence Review, a review of the United Kingdom's defence policy.
   • 2025 December 15, Richard Knighton, “Chief of the Defence Staff speech”, in Gov.uk‎^[1]:

     The SDR made clear that long-term success depends on reconnecting society with the Armed Forces and the purpose of Defence, supported by a national conversation.

• (computing): SDR SDRAM, SDR RAM

• (computing): SDRAM
• (computing): SIMM, DIMM, SODIMM

SDR

1. (uncommon) Initialism of Sara Delano Roosevelt.
   • 1993, Blanche Wiesen Cook, Eleanor Roosevelt, volumes 1: The Early Years, 1884–1933, Penguin, →ISBN:

     One Sunday evening, after a long and discordant weekend, SDR wrote to “Dearest Franklin and dearest Eleanor” about her views regarding “noblesse oblige” and “honneur oblige.”

• -rds, DRS, DRs, Drs, Drs., R&Ds, RDS, RDs, drs., rds