Designed to identify and quantify the potential impacts of the Digital Avionics Information System (DAIS) on weapon system personnel requirements and life cycle cost (LCC), this study postulated a typical close-air-support (CAS) mission avionics suite to serve as a basis for comparing present day and DAIS configuration specifications. The purpose at this stage of the study was to define, as much as possible, the effects of a DAIS architecture on such a suite, and to indentify the differences between the standard and the DAIS versions of the suite in terms of support requirements and LCC. The results of the comparison of the DAIS and non-DAIS show that the expected higher procurement cost for a DAIS system is offset by savings in recurring costs, especially those associated with manpower. (Author/MER)