ORTWIN - Version 15.01 ORTWIN is a program for the state-wide inquiry of the localities, postal codes and telephone selections in Germany. It finds postal zip codes, telephone pre selections, coordinates and ground level elevations. The program determines municipal codes, local center points, car license codes, topographic maps, Unlocodes and much more. It arranges localities hierarchically into the structures federal state, administrative district, rural district, town, municipality, local quarter and domicile. The program performs perimeter searches and distance calculations. It finds landscapes on different levels, natural units and snow- and wind load zones of all localities. In a radius around a place or around a postal code area covered localities and postal areas can be clearly represented by a comfortable perimeter search. They can also be arranged in a list, stored as a file and printed. For the local inquiries and perimeter searches a data base with more than 120.000 geo coded localities is available. The program represents local data, determined by local inquiries and perimeter searches,