Computer system random access memory that has been made impervious to data loss due to power failure through the use of UPS, batteries, or implementation technology such as flash memory.

• 计算机系统随机访问存储器，在这种存储器中不会因为电力故障（UPS或电池发生故障）、亦或闪存形式的技术实现而发生数据丢失的情况。。