Odoo is the world's easiest all-in-one management software. It includes hundreds of business apps:
CRM | e-Commerce | Accounting | Inventory | PoS | Project management | MRP | etc.
To activate the technical features, you have to add access rights to your user. You must edit your current user from the menu
Settings > Users. Edit your user (probably admin) and, in the
Access Rights tab, check the option
Once it's done, you may have to refresh the page to get the new menus.