How spooling requires memory protection?

Question

Memory protection is useful in single-user and multi-user systems. However, i thought what is the use of memory protection in non-multiprogramming systems, as there can be only 1 program in memory.

But, after googling i got something new, that spooling in non-multiprogramming can require memory protection. But i am unable to get any new information of why spooling requires memory protection ?

Is my understanding right or am i missing something ?

Answer 1

However, i thought what is the use of memory protection in non-multiprogramming systems, as there can be only 1 program in memory.

...and, in addition, an operating system with sensitive data. Without memory protection, the program could write criss-cross over the OS, destroy data structures randomly, and wreck the whole system.