Introduction to operating system

Process Memory Management Management Operating System Device File Management System Security & Protection Hardware: VON-NEUMANN Programmer point of view it is called API in Windows; SCl in Linux Memory Input ALU-CÚ Output Operating System is a Collection of Software that manages Hardware and software Von-Neumann follows stored program concept It means Non-Volatile Program stored in ROM; and loading that program is called as Bootstrap Command Interpretor High-Level Language Semaphore,signals, device driver,monitors. Command Line Interface Ex:Shell, Dos Graphical User Interface Ex: Windows Software Resources Operating System goals Scalability Convinence Robustness Primary for Windows. Efficiency Portability API: Application Program Interface SCI: System Call Interface Primary for linux