However, Shared memory does not provide any accesscontrol for processes that use it.
不过,共享内存不为使用它的进程提供任何访问控制。
2
Just two years earlier, IBM had also developed the first random access disk storage device, the random accessMemory for Accounting and Control (RAMAC) 350, so there was a place to store this stuff.
就在两年前,IBM还开发了第一个随机访问磁盘存储设备,Random Access Memory for Accounting and Control (RAMAC) 350,所以有了存放这些东西的地方。
3
MMU Memory Management Unit, translates virtual to physical addresses and provides access permission control.