Single-Level Storage Heap

A heap is an area of storage that is used for allocations of dynamic storage. The amount of dynamic storage that is required by an application depends on the data being processed by the program and procedures that use a heap. The operating system allows the use of multiple single-level storage heaps that are dynamically created and discarded. The ALCHSS instruction always uses single-level storage. Some languages also support the use of teraspace for dynamic storage.