SPD is a common acronym, it may stand for:
- Nintendo Software Planning and Development, a department inside Nintendo
- Sacramento Police Department
- Saidpur Airport, IATA code for an airport in Bangladesh
- Seattle Police Department
- Security Policy Database, in computing, a collection of rules instructing an underlying IPsec implementation what Security Association, if any, to apply to packets received by the device
- Serial Presence Detect, in computing, a standard method to access speed and design information about memory modules
- Shimano Pedaling Dynamics, a service mark that now defines a common type of "clipless" bicycle pedal for mountain bicycles. Shimano also sells road bicycle pedals under the mark SPD-SL, which are not compatible with the widely-known mountain bike SPD
- Small Press Distribution, a non-profit literary arts organization in Berkeley, California
- Social Democratic Party of Germany
- South Pacific Division of Seventh-day Adventists, an organisation that governs the work of the Seventh-day Adventist Church in the Oceania
- Space Patrol Delta, the fictional organization destined to protect the universe in Power Rangers: S.P.D., the 13th Power Rangers incarnation
- Special Police Dekaranger, the fictional police organization in Tokusou Sentai Dekaranger
- Suspended Particle Device, a technology for varying the light transmission properties of glass and plastics electrically
- Spectral power distribution, a description of light power versus wavelength, used in color science
- Symmetric positive-definite matrix, a type of matrix used in mathematics
[edit] Psychology and medicine related
