R&D Systems is a specialty manufacturer of biological products with two operating divisions: Biotechnology and Hematology. The Biotechnology Division serves the basic research, clinical research, and clinical diagnostic markets with cytokine-related products for cancer, development, endocrinology, immunology, neuroscience, proteases, and stem cell research. The Hematology Division ranks among the world's leading developers and manufacturers of hematology analyzer controls, calibrators, and kits for verifying linearity and reportable range.