In Odoo/OpenERP we can inherit or use existing modules object/class/model and views.
We can also inherit a single field of existing modules. Inheritance means we are
going to use or inherit the old class/model, properties, methods, and views in the
new class/model. This concept is related to Object-Oriented Programming. In Odoo/ERP
we extend properties, fields, and views of an existing model in a modular way.