Operating System

 Operating System

An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system. 

An Operating System (OS) is an interface between a computer user and computer hardware. An operating system is a software which performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.

Some popular Operating Systems include Linux Operating System, Windows Operating System, VMS, OS/400, AIX, z/OS, etc.

Functions of Operating System

Following are some of important functions of an operating System.

  • Memory Management
  • Processor Management
  • Device Management
  • File Management
  • Security
  • Control over system performance
  • Job accounting
  • Error detecting aids
  • Coordination between other software and users

    Applications of Operating System

    Following are some of the important activities that an Operating System performs −

    • Security − By means of password and similar other techniques, it prevents unauthorized access to programs and data.

    • Control over system performance − Recording delays between request for a service and response from the system.

    • Job accounting − Keeping track of time and resources used by various jobs and users.

    • Error detecting aids − Production of dumps, traces, error messages, and other debugging and error detecting aids.

    • Coordination between other softwares and users − Coordination and assignment of compilers, interpreters, assemblers and other software to the various users of the computer systems.

      Types of Operating System (OS)

      Following are the popular types of OS (Operating System):

      • Batch Operating System
      • Multitasking/Time Sharing OS
      • Multiprocessing OS
      • Real Time OS
      • Distributed OS
      • Network OS
      • Mobile OS

      Batch Operating System

      Some computer processes are very lengthy and time-consuming. To speed the same process, a job with a similar type of needs are batched together and run as a group.

      The user of a batch operating system never directly interacts with the computer. In this type of OS, every user prepares his or her job on an offline device like a punch card and submit it to the computer operator.

      Multi-Tasking/Time-sharing Operating systems

      Time-sharing operating system enables people located at a different terminal(shell) to use a single computer system at the same time. The processor time (CPU) which is shared among multiple users is termed as time sharing.

      Real time OS

      A real time operating system time interval to process and respond to inputs is very small. Examples: Military Software Systems, Space Software Systems are the Real time OS example.

      Distributed Operating System

      Distributed systems use many processors located in different machines to provide very fast computation to its users.

      Network Operating System

      Network Operating System runs on a server. It provides the capability to serve to manage data, user, groups, security, application, and other networking functions.

      Mobile OS

      Mobile operating systems are those OS which is especially that are designed to power smartphones, tablets, and wearables devices.

      Some most famous mobile operating systems are Android and iOS, but others include BlackBerry, Web, and watchOS.





Comments

Post a Comment

Popular posts from this blog

Computer Hardware and It's Peripherals

Image
computer hardware   Computer hardware is a collective term used to describe any of the physical components of an analog or digital Computer.  Computer hardware can be categorized as being either internal or external components. Generally, internal hardware components are those necessary for the proper functioning of the computer, while external hardware components are attached to the computer to add or enhance functionality. What are internal computer hardware components? Internal components collectively process or store the instructions delivered by the program or operating system (OS). These include the following: Motherboard This is a printed circuit board that holds the central processing unit (CPU)  and other essential internal hardware and functions as the central hub that all other hardware components run through. CPU The CPU is the brain of the computer that processes and executes digital instructions from various programs; its clock speed  determines the com...
Read more

Internet

Image
 Definition of Internet Internet is a global communication system that links together thousands of individual networks . It allows exchange of information between two or more computers on a network. Thus internet helps in transfer of messages through mail, chat, video & audio conference, etc. Uses of Internet  Internet has been the most useful technology of the modern times which helps us not only in our daily lives, but also our personal and professional lives developments. The internet helps us achieve this in several different ways. For the students and educational purposes the internet is widely used to gather information so as to do the research or add to the knowledge of various subjects. Even the business professionals and the professionals like doctors, access the internet to filter the necessary information for their use. The internet is therefore the largest encyclopedia for everyone, in all age categories. The internet has served to be more useful in maintaining...
Read more

Social Impact of Computer on Society

  Impact of Computer in Society Introduction Computers play a vital role in our society. They are the central tools in modern societies. Nowadays, computers are used in almost all the field of society. They are used in education, medicine, entertainment, industries, banks, homes, science and technology, transportation, communication, and businesses. The terms ‘computer’ and ‘society’ are complementary to each other. If a computer is removed from society, society becomes useless. All human activities have a great influence on computers. The progress of any country is measured on the basis of the advancement in Information Technology (IT). But, it has also negative impacts in society, So, we should study the positive as well as negative impacts of computers in society. Computers are used in various sectors like teaching and learning. Some of the major computer application fields are listed below: 1. Management: The computer can also be used as a managerial tool to assist in solving b...
Read more