1. A method for controlling or operating a plurality of target systems via spoken commands, the method comprising: assigning interface information to one or more target systems of the plurality of target systems, the one or more target systems including a first target system; transmitting the interface information from the first target system to a speech recognition system, the first target system being controllable via the spoken commands; checking the first target system into the speech recognition system using the interface information, unless the interface information is stored on the speech recognition system; analyzing the interface information for the one or more target systems including the first target system using the speech recognition system; and identifying spoken commands issued for controlling or operating the first target system as a function of the interface information.