Selective Laser Sintering (SLS) is a 3D printing technology that uses a high-powered laser to selectively fuse powdered materials, such as plastics, metals, and ceramics, into a solid object. The process involves spreading a thin layer of powder over a build platform and then using a laser to selectively melt and fuse the powder particles together, layer by layer until the desired object is formed. SLS is commonly used in manufacturing for rapid prototyping, tooling, and small-scale production of complex parts.