1. What is an Operating System ?
"Operating system is the part of computer system that manages all of the hardware, and all of the software of computer system. It controls every files, every device, every section of main memory, and every nanosecond of processing time."
- Operating system services
- Program Execution
- I/O Operation
- File - system Manipulation
- Communications
- Error Detection
- Resource Allocation
- Accounting
- Protection
- Process Concept
- A process is an entity that consist of number of elements. Two essential elements of a process are program code (which may be shared with other processes that are executing the same program) and set of data (associated with that code)
