Content: Administration of services, personnel, cash management and accounting - Collection of legal provisions and decrees, including judicial decisions on postal, telegraphic and telephone services - International postal agreements and treaties with individual states - Supervision and regulation of postal services, organisation of subordinate postal and telegraph institutions - German postal institutions abroad, especially in German New Guinea, on the Caroline Islands, Mariana Islands, Palau Islands and Marshall Islands, on Samoa and in Shanghai - relations of the Oberpostdirektion with shipping companies, railway companies and forwarding agents - postal statistics - postal traffic with overseas countries, also establishment of postal steamship lines - air and rail postal services - radio and radio broadcasting