applications: synthetic rubber, floor coatings, paints, adhesives, binders for non-woven fabrics, high-impact polymers latex foam, additives for construction materials such as cement and concrete, and rheological modifiers. They are also used in numerous biomedical applications: such as diagnostic tests, immunoassays, biological cell- labeling, (identi­ fication and separation), and drug delivery systems. Small quantities of monodisperse polymer colloids are used as size calibration standards and find extensive use as model colloids to test theories in colloids surface and rheological studies. Advances have been made in our understanding of the mechanism and kinetics of the emulsion polymerization process as well as the stability of polymer colloids. Equal advances were made in engineering areas related to polymer colloids, e. g. modeling of batch, semi-continuous and continuous emulsion polymerization and copolymer­ ization processes.