The Longitudinal Surveys of Australian Youth (LSAY) is a research program that tracks young people as they move from school into further study, work and other destinations. It uses large, nationally representative samples of young people to collect information about education and training, work, and social development. It includes surveys conducted from the mid-1970s through to the mid-1990s: the Youth in Transition Survey (YITS); the Australian Longitudinal Survey (ALS); the Australian Youth Survey (AYS); and the current LSAY collection, which began in 1995. This user guide has been developed for users of the LSAY data. The guide aims to consolidate existing technical documentation and other relevant information. Updates to the Year 95 data file are appended. (Contains 24 tables, 5 figures and 5 footnotes.) [For supporting documents, see "Longitudinal Surveys of Australian Youth (LSAY): 1995 Cohort--User Guide. Data Elements A: Demographics. Technical Report 49A" (ED536756); "Longitudinal Surveys of Australian Youth (LSAY): 1995 Cohort--User Guide. Data Elements B1: Education. Technical Report 49B1" (ED536761); "Longitudinal Surveys of Australian Youth (LSAY): 1995 Cohort--User Guide. Data Elements B2: Education. Technical Report 49B2" (ED536759); "Longitudinal Surveys of Australian Youth (LSAY): 1995 Cohort--User Guide. Data Elements C: Employment. Technical Report 49C" (ED536762); and "Longitudinal Surveys of Australian Youth (LSAY): 1995 Cohort--User Guide. Data Elements D: Social. Technical Report 49D" (ED536760).]