LISTALC

This TSO command will display the allocations currently defined to a TSO session

The syntax is
LISTALC (parameter) and the parameters you can specify are

HISTORY parameter

lists creation and expiration details for the currently allocated data sets as well as their password protection status

lists details of member data sets in the specified PDS

lists ddnames and disposition of the dataset

This will display a list of allocated data set including temporary ones created by the system

Do note that this command will most likely produce a very long list of results.