How Operating System Work. Without a computer operating system a computer and software programs would be useless. What Is Operating System Explain Types Of Os Features And Examples Step 2 After that the system call is executed in the kernel-mode on a priority basis. . Character User Interface Operating System. They are as follows. An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computer software. In monolithic Kernels both user services and the kernel services are implemented in the same memory space. The normal operating system is further classified into two types. In this Operating system Data is Stored and Processed on Multiple Locations. For example Scientific experiments medical imaging systems industrial control systems weapon systems robots air traffic control systems etc. Most operating systems launch a distinct kernel thread fo...