We have completed the design and programming for a microcomputer software system providing personal, self-administered risk assessment for HIV infection. The risk assessment is based upon an anonymous interactive interview and analysis performed by a rule-based expert system incorporated in the software. The purpose of this project is to support the revision and expansion of the software to accommodate simultaneous risk assessment for chlamydia trachomatis, the most prevalent sexually transmissible disease in the nation. The system will not require respondents to possess specialized training or computer experience. Following analysis of an individual's personal history taken by the interactive interview, the completed software will respond with advice as to whether the respondent is at risk for HIV and/or chlamydia trachomatis and will also write anonymous case data to DOS files for interface with statistical software.Awardee's statement of the potential commercial applications of the research:Potential licensees may be found in the form of state and local health departments, public schools and libraries, clinics and various health facilities, universities,counseling centers, and private sector employers with employee health promotion programs.National Institute of Allergy and Infectious Diseases (NIAID)