An application platform is disclosed. Also disclosed in a method for operating a data processing arrangement on which the application platform is implemented as well as a plurality of applications which are executable on the application platform by accessing at least one programming interface of the application platform. At the same time, a plurality of operating system processes running in parallel on the application platform are generated as a result of the execution of at least two applications. In at least one embodiment for this purpose, the application platform includes a process connection module. The process connection module generates an inter-process user interface by which the parallel-running operating system processes collectively interact with a user of the data processing arrangement.