{{TOC right}} '''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 * SLD resolution, the basic inference rule used in logic programming * Stanford Large Detector (1992–1998), for the Stanford Linear Collider * Superluminescent diode, a light source * Soft laser desorption, a laser desorption of large molecules that results in ionization without fragmentation
==Graphics== * Single-line diagram, of a 3-phase power system * Straight-line diagram of a road * Styled Layer Descriptor of map layers
==Politics and law== * Democratic Left Alliance ({{lang|pl|Sojusz Lewicy Demokratycznej}}), a Polish centre-left political party * Democratic Left Association ({{lang|pl|Stowarzyszenie Lewicy Demokratycznej}}), a political party in Poland * Social and Liberal Democrats, former name of the Liberal Democrats (UK) * Statute law database, UK
==Transport== * Salford Crescent railway station, Greater Manchester, England, National Rail station code SLD * Sliač Airport, Slovakia, IATA code * Sutherland railway station, Sydney Sutherland, Australia, station code SLD
== Other uses == * Self love deficient, the defining trait of echoism * SLD glass, with low dispersion * Severe learning difficulties, a UK term for a level of Special Educational Needs (SEN) * Specific learning disability, disorders intrinsic to an individual * Supercooled Large Droplet, a type of atmospheric icing condition * Delta8-fatty-acid desaturase, an enzyme
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