Rapid Prototyping (RP) is a technique for direct conversion of 3D CAD data into a physical prototype using a number of techniques, mostly based on slicing a three dimensional object into multiple two dimensional layers and building them up one layer at a time. Industries have been using RP techniques increasingly to reduce their product development cycle time. Having realized the potential of RP for prototyping applications, a large number of processes have been developed allowing the use of various materials ranging from plastics to metal for the development of prototype. Layer Based Manufacturing: Technology and Applications will deal with various aspects of manufacturing as it relates to rapid prototyping. It is written as a reference text for those wishing to understand the technology and for students studying it as a part of a course in rapid prototyping and related technologies.