Features:
1. process management (CPU management)
Process Creation
Process Scheduling
Interprocess communication
2. Memory Management
distribution
shared
protection
Virtual Memory Management
3. Device Management
Equipment allocation and scheduling
Device independence for
Transmission equipment control
Device Drivers
4. File Management
storage
File Operations
Directory Operations
Storage management of files and directories permissions
definition:
The operating system is to provide a memory management and process management software
The operating system is a large system program:
1. Provide Interface
2. Resource allocation and management of resources
.