An operating system is a program that acts as an interface between the software and the computer hardware. It is an integration set of specialized programs that are used to manage overall resources and operations of the computer. It is a specialized software that controls and monitors the execution of all other programs that reside in the computer, including application programs and other system software. Example of Operating system Window 95 Window vista Window 7 The main Goals and Objective of Operating system are: To make a computer user friendly. Proper utilization of computer resources. To hide the details of the hardware resources from the users. To provide users a convenient interface to use the computer system. Characteristics of Operating System Memory Management - It keeps track of primary memory, i.e. what parts of it are in use by whom, what parts are not in use, etc. Allocates the memory when the process or program...