AssayZap is an assay analysis tool usable for general assay purposes but with special tools to facilitate automatic assay equipment used for ELISA, RIA and IRMA. It is supplied by Biosoft whose Email address is AB47@CITYSCAPE.CO.UK Tel: +1 314 524 8029 (U.S.A.) +44 (0)1223 368622 (Europe). Translation routines are already given for a wide range of equipment but if the program does not already support your plate reader or other equipment, Biosoft will customize it for you without charge. AssayZap can process data from 96-well plate readers in any order: so assays can be set up to your own design. AssayZap is a universal assay calculator for RIA, ELISA, IRMA, colorimetric or any other type of assay. Counts of up to 2^31 can be handled. Standard curves can be fitted by 2-parameter, 4-parameter or 4-parameter weighted fit, or by the unique interactive manual fit which permits all standard curves to be fitted, whatever their shape. Assays may include up to 2000 tubes and up to four standard curves, each of which can incorporate up to 24 values. Assay drift can be compensated by interpolation of results between standard curves. AssayZap can maintain a historical record for each assay, and enable the current standard curve and QCs to be compared with this and adjusted if necessary. AssayZap includes communication routines permitting the computer to upload data directly from any instrument with a R232 or R422 interface. Translation commands are already incorporated for LKB, Packard, Nuclear Enterprises, Titertek, Dynatech, Rack, Clinigamma, Multigamma, Gammamaster, Delfia, Labtek, Dynatech, Digitech, Wallac, Tracor, Bio-Tek and Biorad instruments. Data can also be keyed in manually, or transferred from spreadsheets such as Excel. Graphs can be saved as PICT files and results are in text format which can be cut and pasted or imported to other programs. AssayZap is compatible with System 6 and System 7. It runs on any Macintosh from a Plus to a Quadra or Power Mac. (Quadra can be run with the processor cache on). It uses the arithmetic coprocessor if present. A separate native Power Mac version is supplied on the disk together with the conventional Mac version.