As a firefighter and first responder, I've always thought it would be useful to have technology like HUD systems integrated into the SCBA (self-contained breathing apparatus) masks, to better assist us when fighting fires, performing rescues and salvage & overhaul tasks. Since the introduction of HoloLens, it seems that firefighters/first responders would be the perfect candidates to utilize this technology, while allowing us to perform our jobs more safely and efficiently.