The paper, directed to individuals interested in indoor air pollution, is an introduction to, and directions for the use of, the indoor air pollution source data-base (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: combustion, material, and activity 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, allowing them to add their own data to the database and to arrange the data in a format suitable for searching. The data-base is currently available in a dBase III version or a Clipper compiled version.