In 8100, one of two subpools that make up the common address space section (CASS). The read-only subpool does not let unauthorized users write into it but any process in any address space can read it.

• 在IBM 8100系统中，构成公用地址空间段(cass)的两个子存储池之一。只读子池不允许非特权用户写入信息，但任一地址空间中的任何处理都可以读出只读子池中的内容。