The paper, directed to individual interested in indoor air pollution, is an introduction, and directions for the use of, the EPA indoor air pollution source database (also known as the indoor air source emissions database). The database is a computerized system containing source characterization studies done in the U.S. and abroad. It addresses the entire range of indoor air sources. It provides ready access to such information as: emission factors determined for each of the pollutants and sources tested, data about the test facility, conditions of the experiment, sampling and analytical data, and an abstract of each publication. The program also includes options for researchers carrying out their own source characterization studies. The database is currently available in a dBase III version or a Clipper compiled version.