1. A speech recognition system which identifies an action to be taken upon receipt of a command that is given to the system by a user's speech, comprising: (a) at least one speech recognition unit EM via which the command is received and recognized, (b) an input memory ESP in which the command is stored, (c) an action determination unit (AE) which identifies at least one action which is indicated by an action indicator, the action determination unit (AE) is being constructed such that (1) a first set of actions is formed in which the actions are stored wherein all action indicators coincide with at least one part of prescribable key concepts that are allocated to an action, (2) that a second set of actions is formed in which the actions are stored wherein at least a part of the action indicators coincide with at least the part of the prescribable key concepts, and (3) the first set of actions and/or the second set of actions is employed as a basis for the unambiguous determination of the action indicated by the command, and (d) a parameter parser (PP) with which action parameters prescribable from the command that are allocated to an action and are employed for the execution of the action are identified.