The document discusses BMC Subsystem Optimizer for zEnterprise (Subzero), a product that allows CICS, DB2, and IMS databases to run on separate logical partitions (LPARs), reducing monthly license charges. It provides examples where Subzero lowers costs by 16-30% by optimizing workload placement across LPARs. Technical details are also given on how Subzero intercepts and routes data requests between subsystems on different LPARs without requiring application changes.