TechOnespot

 Chapter - 5 Introduction to Operating System A modern computer system has a variety of resources like the CPU, memory, secondary storage, network, peripheral devices, etc. A computer without any kind of software for above operations is a practically unusable device, because it may not even have the basic user interface to interact with the user. Thus an operating system exists to satisfy all these needs. Because it controls the whole system, it is always the first program to be started when the computer system is turned on.  What is an Operating System ? An operating system is the controller, resource allocator and common services provider for a computer system. Like the government, it performs these functions to ensure smooth and mostly trouble-free operation of the computer.  The Startup Process of a Computer When the computer is supplied power and turned on, the CPU takes control of the whole system. The computer has a type of permanent memory called ROM (on personal computers, thi