The inter-system communications techniques include a system, and/or a method. In some embodiments of these techniques, the method includes receiving data from a first system. The method further includes storing the received data in an in-memory database. The method further includes determining a second system to inform of the received data using a system assignment table. The system assignment table includes a source system identifier, a target system identifier, a first field, and a first field value. The method further includes informing the second system of the received data when the first field value matches a value associated with the first field of the received data.This Abstract is provided for the sole purpose of complying with the Abstract requirement rules. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.