LECTURE TOPICS

Operating systems are the brain of the computer, supporting basic functions, such as scheduling tasks and controlling peripherals.

Background              The Computer System               Software               Kinds of Operating Systems

Computer Security Categorization   System Access Threats    Couuntermeasures to System Access Threats   Firewalls    Firewall Goals

Security issues of Operating system as discussed in this section, making us understand the various security threats that operating systems face and their commensurate mitigating tools and activities.

Operating Systems manages computer hardware and software resources and provides common services for computer programs.  Operating software simply  enables the computer hardware to communicate and operate with the computer software.

LECTURE 3

Computer System Structure

Memory Management Requirement

Memory management is the functionality of an operating system which handles or manages primary memory and moves processes back and forth between main memory and disk during execution.  Memory management keeps track of each and every memory location, regardless of whether already allocated to some process or free.

Need for Virtual Memories

In computing, virtual memory (also virtual storage) is a management capability of an OS that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage  It is a memory management technique that provides an idealized abstraction of the storage resources that are actually available on a given machine which "creates the illusion to users of a very large (main) memory.

Multimedia uses a combination of different content forms such as text, audio, images, animations, video and interactive content.

Multimedia uses a combination of different content forms such as text, audio, images, animations, video and interactive content.

In the era of mobile phones and other mobile computerized electronic equipments, there is the need the study of mobile operating systems.  Thes are bond to affect our views of operating systems in general and would help us appreciate more the concept of operating systems, especially in our present age.

We will take a general approach to operating systems in this section.

In this section, we will see some of the popular operating systems, in a appreciation.

In this section, we will see some of the popular operating systems, in a appreciation.

This sections deals with the basic functioning of operating system.

The class will watch a video here.