Use the LISTALC command to obtain a list of the currently allocated data sets. The LISTALC command without operands displays a list of all (partitioned and not partitioned) data set names the user has dynamically allocated and those allocated by previous TSO/E commands (issued while in the current TSO/E session). This list includes terminal data sets, indicated by the word TERMFILE, and also attr_list_names created by the ATTRIB command, indicated by the word NULLFILE.

If the list should include also temporary data sets, which are created and deleted in the same job, use the SYSNAMES keyword operand to display these data sets. See z/OS MVS JCL User's Guide for a detailed description of permanent and temporary data sets.

If an asterisk precedes a data set name, it indicates that the data set is allocated, but marked not-in-use.