Rochester Childfirst Network provides a range of services including early intervention, home-and center-based care, and pre-kindergarten. This case study describes their use of COMET, a web-based data system supported by The Children's Institute of the University of Rochester, to link data within their program and with other programs in the Rochester Early Childhood Assessment Partnership. The case study highlights an example of linking data by entering information into a single, shared community-wide database. (author abstract)