Back-Office component is an integrated component with ArtPos. If you licence ArtPos as a back-office it will serve all manager & back-office functionalities. As you may notice Till-component includes back-office component functionalities. The difference is Till-component is not good to keep data for a long period of time as it is used for daily transactions. Back-office component, if installed on a separate computer/server, collects all data from Tills and generates more sophisticated reports.