Operating Systems Components of OS I Dr M
- Slides: 8
Operating Systems Components of OS (I) Dr. M. Tanvir Afzal
Components of OS (I) Software Classification 2
Components of OS (I) Inside OS ü User requests some actions and OS communicates with the user. ü The portion handles communication with user called “User Interface”. ü Older interfaces known as Shell – communicates using text messages. 3
Components of OS (I) Inside OS ü Modern systems perform through Graphical User Interface (GUI), pictorial representation as icons. Support mouse, pointing devices, touch screen can be handled with fingers. ü Early GUI applications could be loaded from MSDOS. ü This is still a utility program in windows. 4
Components of OS (I) Windows Manager ü Component of GUI. ü Allocates block of space on screen, called 5 windows, and keep tracks which application is associated with which window. ü When application wants to display anything on screen, it notifies the windows manager. ü It places desired image in the dedicated window.
Components of OS (I) 6
Components of OS (I) Kernel ü ü ü 7 Internal part of Operating System. Performs very basic operations: File manager Device Drivers Memory manager
Components of OS (I) ü. User Interface ü Shell vs GUI ü Windows Manager ü Kernel 8
