Action Behavior Centers - ABA Therapy for Autism (“ABC”) is the leading provider of Applied Behavior Analysis (ABA) therapy in Texas, Arizona, Colorado, Illinois, North Carolina, and Minnesota. With over 350 locations open and a community of more than 12,000 Autism professionals, the company serves thousands of children and families with Autism. Littleton is a city located in Arapahoe, Douglas, and Jefferson counties in Colorado. Littleton is the county seat of Arapahoe County and is part of the Denver-Aurora-Lakewood metropolitan area.