What is the difference between an App, an Addon and a Module? Is there even a difference between Addon and Module?
It matters to me since I want to have a clear idea about what is mentioned. Nomenclature is important. Each project hsa its own names for things. E.g. Drupal has Modules and Themes, Joomla has 3 different things, Module, Component, Plugin.
Google "addon openerp" https://launchpad.net/openobject-addons https://launchpad.net/openerp-extra
To complete the question, does Odoo have something like themes (Drupal) or skins (MediaWiki)?