&NA;Behavior analytic programs for preschool children with autism have developed from extensive, programmatic research conducted continually since the early 1960s. Recently several programs have reported highly favorable outcomes. The article describes one such program, the University of California, Los Angeles (UCLA) Young Autism Project. It reviews outcome data, replication and dissemination efforts, frequently voiced concerns, and future directions. Based on existing scientific evidence, increasing the availability of behavior analytic programs such as the UCLA project is warranted. Still, additional data and research are needed on program outcomes.