The objective of the unified database (UDB) program was to develop an automated information system that would be useful in the design, development, testing, and support of new Air Force aircraft weapon systems. Primary emphasis was on the development of: (1) a historical logistics data repository system to provide convenient and timely access to relevant information about existing aircraft weapon systems; (2) a fully automated logistics support analysis record system that would satisfy current Air Force and Department of Defense requirements; and (3) an overall UDB system to function as a closed-loop system for use throughout the life of a weapon system. This report summarizes the accomplishments of the UDB program and major UDB system features and capabilities. Report sections describe project background; the UDB concept and objectives; the Automated Logistics Support Analysis Record (ALSAR) system, which has been fully developed and partially tested using HH-60 helicopter data; the current development status of the prototype Aircraft Characteristics Data File (ACDF), which will contain historical data on aircraft weapon systems; related studies of the Air Force Operational Test and Evaluation Center (AFOTEC) requirements for a new weapon system and of combat data sources; and conclusions and recommendations for future UDB development. A four-item bibliography, a list of abbreviations, and sample ALSAR data sheets and ACDF online data screens are also provided. (Author/ESR)