To maximize cost benefit savings, influence design, and facilitate the trade-off decision process, the requirements for manpower, personnel, training, safety, health hazard prevention, and human factors engineering must be addressed as early as possible in the acquisition cycle. To ensure that human issues are integrated into the total system, the new DoDI 5000.2, "Defense Acquisition Management Policies and Procedures" requires analysis and reporting of these factors throughout the acquisition process. A NATO Research Study Group (RSG. 21) was formed to identify, define, and describe the tools, techniques, and databases that enhance early consideration and integration of human issues at appropriate acquisition milestones. RSG. 21 developed the term "Liveware" to collectively describe the domains of manpower, personnel, training, safety, human factors engineering, and health hazard prevention. Liveware is defined as the human component of a weapon system in its integrated environment. Collection of descriptive information about existing and emerging Liveware technologies is being accomplished by the Office of the Secretary of Defense under the auspices of RSG. 21. This effort involves industry and government developers, owners, and users. The resulting collection will represent the most complete automated catalog of international Liveware technologies available. Access to the catalog is to be provided to the entire acquisition community. This paper (1) describes the requirements for and importance of human system information during the acquisition process; (2) defines the Liveware domains; (3) summarizes previous collections of information; (4) describes the need for a Liveware database; (5) describes the concept and scope of the database which produces standardized Liveware data, the information available, and methods for accessing the catalog; and (6) summarizes the benefits to the acquisition community from use of the data.