operating systems

operating systems

1. controling the cetural parts of the comuter

   • software
   • hardware
   • systems

2. Memory management

   • memory must be allocated to user programs, and reused by other programs when it is no longer required. The operating system can pretend that the computer has more memory than it actually does, and also that each program has the machine’s memory to itself; both of these are features of virtual memory systems.

3. To ensure securaty

   • the operating system makes you give a username and password befor you can change the code writan or changed. this allawes securaty