SDM

Technology

 * Sigma-delta modulation
 * Seed-based d mapping, a meta-analytic method for neuroimaging.
 * Software development methodology
 * Cap Gemini SDM, a software system development method originally written by PANDATA.
 * Sparse distributed memory
 * Space-division multiplexing

Transportation

 * Brown Field Municipal Airport, San Diego, US, IATA designator
 * Shieldmuir railway station, Scotland, National Rail code
 * Stadium MRT station, Singapore, MRT station abbreviation
 * Watergardens railway station, Melbourne, code

Other

 * Scarlet Devil Mansion, a location in the danmaku video-game series Touhou Project
 * Shared decision-making in medicine
 * Shoppers Drug Mart, a Canadian pharmacy chain
 * Slovenian Democratic Youth (Slovenska demokratska mladina)
 * Squad designated marksman
 * Squared deviations from the mean, in mathematics
 * Standard days method, a calendar-based method of contraception
 * Sub-divisional magistrate, India