Displaying and navigating complex information on wearable computers is very different from accessing the some information while sitting at your desk. Limitations in hardware, screen-size, input- and output devices are not met with changes in the software running the wearable system. We propose using the ABC-framework as a middleware layer providing collaboration, adaptation, activity sharing and context-awareness for wearable applications. Furthermore, enhancements in the user-interface and interaction techniques overcome some of the hardware limitations. The proposed system makes wearable computers usable by e.g. emergency workers, policemen and firefighters.