Computerization of pesticide information is rapidly becoming a necessity as regulatory agencies expand their activities through enforcement, monitoring, and certification of pesticide applicators. Educational institutions responsible for providing pesticide information and pesticide applicator training for certification must also expand their capabilities for immediate updating and faster retrieval. Two programs at Cornell University, the Chemicals-Pesticides Program and the Pesticide Impact Assessment Program (PIAP), are presently involved in developing, on-line pesticide information for researchers, extension personnel, and regulatory agencies as well as for those using pesticides.