Releasing Data Sets with the FREE Command

Using the FREE command, you can request that the system:

Release all data sets and ddnames not currently in use, which were explicitly allocated with the ALLOCATE command (ALL operand)
Release one or more specific data sets (DATASET operand)
Release a z/OS UNIX file (PATH operand)
Release a ddname from previous allocations (FILE operand)
Send SYSOUT data sets to a specific printer or destination (DEST operand)
Release the SYSOUT data set for printing after deallocation or at the end of the job (SPIN operand)
Place a data set in a HOLD queue to print later or view only (HOLD operand)
Not place a data set in a HOLD queue (NOHOLD operand)
Retain the data set after you release it (KEEP operand)
Delete the data set after you release it (DELETE operand)
Retain the data set in a catalog after you release it (CATALOG operand)
Remove the data set from a catalog after you release it. The system still retains the data set (UNCATALOG operand).