digraph G {
    node [ shape=box, fontcolor="#ffffff", color="#40a9e3", style="filled"  ]
    label="vendor neutral car backup by ungleich v3"

    subgraph cluster_dcl {
        label="Data Center Light";
        customer_car_storage [ label="Encrypted storage per user and car" ]
    }

    subgraph cluster_car {
        label="Original car, brand 1";
        microcomputer [ label="ungleich micro computer\n Maybe pcengines APU?" ];
        carmedia [ label="Regular car media system" ];

        carmedia->microcomputer [ label="Stores user+car based data" ]
        microcomputer -> customer_car_storage [ label="Backs up data regularly\nUsing IPv6 VPN" ];

    }

    subgraph cluster_car2 {
        label="Replacement car, brand 1";
        microcomputer2 [ label="ungleich micro computer\n Maybe pcengines APU?" ];
        carmedia2 [ label="Regular car media system" ];

        carmedia2->microcomputer2 [ label="Stores user+car based data" ]
        microcomputer2 -> customer_car_storage [ label="Backs up data regularly\nUsing IPv6 VPN" ];
        customer_car_storage -> microcomputer2 [ label="Restores data from original car" ];
    }

    subgraph cluster_car3 {
        label="New car, brand 2";
        microcomputer3 [ label="ungleich micro computer\n Maybe pcengines APU?" ];
        carmedia3 [ label="Regular car media system" ];

        carmedia3->microcomputer3 [ label="Stores user+car based data" ]
        microcomputer3 -> customer_car_storage [ label="Backs up data regularly\nUsing IPv6 VPN" ];
        customer_car_storage -> microcomputer3 [ label="Restores data from user\nIgnores car specific data from other car" ];
    }


    subgraph cluster_questions {
        node [ shape=oval ];
        label="Questions"
        rankdir=lr;


        effort_microcomputer [ label="How much effort to design/create microcomputer?" ];
        effort_sales [ label="How much effort to sell?" ]
        sales_prob [ label="How likely to sell?" ]
        approach [ label="How to approach cross-vendor?" ]

    }

    subgraph cluster_user_owner {
        label="Car Owner";
        mobilephone [ label="Mobile phone" ]
        computer [ label="Computer" ];
        laptop [ label="Notebook" ];

        {mobilephone,computer,laptop}-> customer_car_storage [ label="Remotely access data" ]
    }

}