This work offers polymer chemists and engineers a method for very rapidly determining which polymers and co-polymers mix and do not mix. The CD-ROM calculator is designed to aid in determining promising polymer blends for many different applications. A self-guided tutorial on the CD-ROM, as well as an accompanying booklet, presents the theoretical background.Based on twenty years of research, Miscible Polymer Blends is an inexpensive, easy-to-use instrument for investigating and refining polymer combinations. The package offers succinct and precise explanations, which will be of value to those requiring a clear introduction to the fascinating field of polymer blends.