# Volume Users

The Volume Users attributes allow a system administrator to identify the applications that are allocated to a logical volume and the data sets that are being used on the volume by each application.

Application: The name of the application (STC, TSO user, or batch job) using the volume.

ASID: ASID of the application using the volume, displayed as 4 hex digits.

Data Set Name: The name of the data set on the volume that is allocated.

DD Name: The DDNAME associated with the allocation.

Managed System: The name identifying the monitored system.

Open Count: Number of opens issued by the job against the dataset.