The purpose of this work is to create a software package for the computer aided design of the RCCC spatial mechanism. The RCCC mechanism has been synthesized for three precision positions and the solutions have been obtained in closed form. Besides analysis and synthesis, various other mechanism considerations like mobility, branching, order problems, link-length ratio, and fixed pivot location have been discussed. A program for the type determination of the resulting RCCC mechanism is also included. In addition to the above material, application of the theory and use of the programs is explained by means of examples. In conclusion, recommendations are made for further improvement and enhancement of the software package. The theory used as a basis for writing the programs is in part original and in part derived from current and past mechanism literature. / M.S.