In Sweden, vehicle registration plates (Swedish: registreringsskylt) are used for most types of vehicles. They have three letters first, a space and two digits and one digit or letter after (e.g. ABC 123 or ABC 12A). The combination is mostly a random number and has no connection with a geographic location. The last digit is used to show what month the vehicle tax has to be paid, and before 2018 it was also used to show what month the car had to undergo vehicle inspection. Vehicles like police cars, fire trucks, public buses and trolley buses use the same type of plate as normal private cars and cannot be directly distinguished by the plate alone. Military vehicles have special plates. Part of the vehicle data is public and can be retrieved online.[1]