SLD

SLD may refer to:

Computers and technology

• Second-level domain, an Internet domain directly beneath the top-level domain
• Simple learning design 2.0, a specification used to express learning activities
• Semiconductor laser diode, a laser diode based on a semiconductor
• SLD resolution, the basic inference rule used in logic programming
• Stanford Large Detector (1992–1998), the main detector for the Stanford Linear Collider
• Superluminescent diode, a light source

Graphics

• Single-line diagram, a simplified power system schematic
• Straight-line diagram, a diagram of a road where the road is shown as a straight line
• Styled Layer Descriptor, a technical specification for describing the appearance of a map layers

Politics and law

• Scottish Liberal Democrats, a political party in Scotland
• Social and Liberal Democrats (1988), a former name of the Liberal Democrats party in Great Britain
• Sojusz Lewicy Demokratycznej, a political party in Poland
• Statute law database, a directory of laws in force in a given jurisdiction

Other

• Single Lens Digital, a type of mirrorless interchangeable-lens camera
• SLD glass, a type of glass with low dispersion
• Specific learning disability, disorders of learning and cognition that are intrinsic an individual
• Supercooled Large Droplet, a type of atmospheric icing condition
• Sutherland railway station (Australia station code SLD), on the Illawarra Line, suburb of Sydney Sutherland
• The Southland Region of New Zealand