AWS ELB is a network load balancer service provided by Amazon Web Services for distributing traffic across multiple targets, such as Amazon EC2 instances, containers, IP addresses, and Lambda functions.
Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language and WebSocket technologies.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.