RFID ( something similar to track) markers on parking spots ( malls, airports, garages, etc) have an app on your mobile device that connects with the satellite tracking and shows where an empty parking space is so you are not driving around looking for a spot. You can mark the spot on your phone and it will save it for 5 minutes. It also acts as a reminder to where you parked your car ( level 3 row c). It also times your car in the event that the parking is an hourly charge. Potential sponsors Insurance Companies, Automakers, Banks, etc.