The RepRap Project is an initiative aimed at creating a largely self-replicating machine which can be used for rapid prototyping and manufacturing. A rapid prototyper is a 3D printer that is able to fabricate three dimensional artifacts from a computer-based model. Project authors describe 'self-replication', understood as the ability to reproduce the components necessary to build another version of itself, as one of the goals for the project. It is self-replication that distinguishes the RepRap Project from the similar Fab@Home project.