This document discusses how to scale applications using AWS Elastic Beanstalk. It begins with an introduction to AWS and Elastic Beanstalk. It then covers how to deploy applications using Elastic Beanstalk, including creating environments and configuring auto scaling. It also discusses how to implement load balancing across availability zones and regions using Elastic Load Balancing and Route 53 for fault tolerance and high availability. The key takeaways are that Elastic Beanstalk makes deploying and scaling applications on AWS easy, and cross-zone and cross-region configurations can improve availability.