From one point of view it's all binary, but here are the layers of one project that I worked on (and this is the simplified version): Browser > javascript > cl

From one point of view it's all binary, but here are the layers of one project that I worked on (and this is the simplified version): Browser > javascript > client library > jQuery > apache > Jboss > Spring > Tomcat> controller logic > business logic > Hibernate > cache> database > jsp > libraries