URL: https://role.rhu.redhat.com/rol-rhu/rhz/rhls/course/jb183ea-7.0/ch02
Reporter RHNID: rhn-support-obockows
Section: SGPackagingDeploying-AppServer-Overview-lecture - Describing an Application Server
Language: en-US (English)
Workaround:

Description: "EAP has a modular architecture with a simple core, which controls the basic application server life cycle and provides management capabilities. The core is primarily responsible for loading and unloading modules, which implement the bulk of the Java EE 7 APIs. Each of the Java EE component APIs are implemented as subsystems, which can be configured, added, or removed as required."

maybe it is clear for someone who knows EAP but for a newbie it is not clear, actually it is obscure.
so there is core and what from picture is core? Maybe it would be worth to put names between brackets ? e.g. core (msc, jboss modulss etc.)
Module = many APIs?
a specific one API = subsystem?
And what is |service controller service?
Really this picture is not clear