Free Storage and Free Space

In the context of z/OS, "Free" primarily refers to unallocated or unused resources that are available for immediate use. This commonly applies to **Free Storage**, which is portions of virtual or real memory not currently assigned to a program or system component, and **Free Space**, which is unused capacity within data sets (like VSAM or DB2 table spaces) or on Direct Access Storage Devices (DASD) volumes. Both are critical for system operation, program execution, and data management, ensuring resources are available when needed.