Beginning with Odoo 9, Odoo SA started releasing two versions of Odoo: a Community Edition and an Enterprise Edition. The Community Edition is free, open source, and primarily supported by the Odoo community. Odoo Enterprise, while also open source, requires a license based on the number of users. More recently, Odoo pricing for the Enterprise version varies depending on region.
Odoo Enterprise offers an alternative (arguably better) user interface. Additionally, there is better functionality in some applications as well as support by SA, and perhaps most critical of all, migration to the new releases of Odoo. More information on the differences between Odoo Community Edition and Odoo Enterprise Edition is available in Chapter 16, Comparing Community and Enterprise Edition.
This book primarily targets the Community Edition of Odoo.