ECDI made reference products—books, CDs, custom databases, and online offerings—for more than 30 years. In August of 2024 we delivered our last project and later that year closed up shop.

Our work involved doing research and analysis, writing, producing graphics, working with statistics, data processing, editing, and typesetting. We are keeping the site active as an archive of our work, often helpful as former colleagues do marketing and work with new clients.