The Resource name links the events, tasks, etc. to a specific name in the Calendar. It will also print on the Calendar report. 

Multi-User calendar (agenda) - Manual - Shop - Once-off license - 

This plugin adds the multi-user agenda (multiple agendas) to the Calendar (Planner). You can add agendas and link them as default to the current user. For every agenda a tab will appear in the agenda Calendar so you can see what the appointments, etc. are on other agendas. You can have a agenda for each employee, salesperson, user, etc. and create invoices directly from his / her agenda with a simple click. Each agenda has it's own calendar and task list.

By default a Resource is already defined as osFinancials or osFinancials5 in each of the Firebird database templates you may download from the Downloads screen launched from the Creation wizard - Let osFinancials help you to create a Set of Books? option. 

After creating a Blank database on the Creation wizard - Customise your own Set of Books (Advanced)? option, no resource is available for the blank database. 

When you start to add an Event to the Calendar for the first time, the following confirmation message is displayed:

Click Yes to add a Resource name. 

Click OK to save the resource.