The enzyme-linked immunosorbent assay (ELISA) is used extensively in immunologic research for obtaining quantitative estimates of immunoglobulin concentration in cell culture supernates. Through incorporation of a microcomputer for data acquisition, storage and rapid calculation of results, a substantial reduction in total assay time may be realized. Described here are a set of menu-driven programs written in Basic for the IBM-PC which provide advantages over existing software in simplicity, versatility and accuracy. Hardware requirements are minimal. These programs should encourage greater flexibility in terms of the size and complexity of experimental designs.