The GEOVAC software application is a tool designed to help personnel of regional level centers of public health and the National Center for Disease Control in Georgia process a large flow of immunization-related data in much less time than the previous (manual) system. This document illustrates GEOVAC functions, relating them to the features of the upgraded Georgian immunization information system and demonstrating what it can offer immunization managers in the decision making process. It is designed primarily for policymakers in countries planning to strengthen their immunization and/or surveillance systems, donor organizations that can support such reforms, and agencies working in these technical areas.