Memory management
Process isolation: Control and share memory when multiple
process running. Preventing overwrite
another program data or instruction in main memory.
Automatic allocation and management: Program should allocate
memory dynamically. Large amount of memory allocate to low memory needed
program is wasting memory. Also amount
of memory should allocate according to the need of corresponded program.
Support of modular programming: Program define on separate
modules. Size of module change dynamically.
Protection and access control: In memory shared system, data
can be collect by another program. Therefore OS should create partition and
provide access privilege according to corresponded program.
Long term storage: OS should provide facility to store for
long time even after computer power down.
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