The document discusses reverse engineering and several projects using 3D laser scanning and reverse engineering techniques. It describes reverse engineering as discovering how a device works through analysis of its structure and function. Several tools for reverse engineering are mentioned, including 3D printers, laser sintering machines, CMM, and 3D scanners. Several projects are summarized that used 3D laser scanning for applications like creating digital part catalogs, CAD-to-part inspection, digitizing sculptures for replication, mold design and manufacture, and digital 3D CAD catalogs for parts.