ICT G-10 E.pdf

5 Operating Systems By completing this lesson you will learn, the necessity of an operating system the function of an operating system user interfaces of operating systems services of an operating system types of operating systems...

5 Operating Systems By completing this lesson you will learn, the necessity of an operating system the function of an operating system user interfaces of operating systems services of an operating system types of operating systems advantages of operating systems utility Programmes of operating system 5.1 Introduction to Operating Systems A Co The booting instructions stored in the ROM (Read Only Memory) are called How the initial operations of a computer are performed When the user powers up the computer the CPU (Central Processing Unit) After that it reads the MBR (Master Boot Record) in boot drive in accordance Then the computer loads in the Operating System in boot drive to the RAM (Random Access Memory) For free distribution 129  This whole process is called booting which means that an Operating System Software is a set of instructions given to the computer to perform some Software System Software Application Software a) Operating System b) Utility Software Word Processing c) Language Translators Spread Sheets Database Computer Games Assembler Web Browsers Compiler Interprter Figure Types of Software 5.1.1 System Software System Software Operating System – The Operating System provides for the user to utilize the functions of a computer by managing the hardware 130 For free distribution  Application Software Database Word Processing Spreadsheets System Software Computer Web Games Operating Utility Browsers Hardware System Software Keyboard Mouse Projector Utility Software – These are used to manage and analyze the software virus infections c Language Translators For free distribution 131  5.1.2 Application Software The application software which runs on the Operating System is used to carry out computer based activities of the user such as creating documents, mathematical Web browsers 5.1.3 Importance of Operating System The software which facilitate the interaction between human user and Operating System manages all the input, output and computer memory too, which means that Operating System is the sole software which manages the whole Human User Application Software Operating System Other System Software Hardware 132 For free distribution  5.1.4 Introduction to several Operating Systems 1. Microsoft Windows Operating System This Operating System which was introduced by Microsoft is proprietary Operating System very popular around the world and is available in many different Windows Xp, Windows vista, Windows 7, Windows 8 In addition to the above versions there is a Windows Mobile version which 2. Apple Mac Operating System The Mac Operating System which was developed by Apple Incorporation 3 Ubuntu Operating System U com Android Operating System 5 Hanthana Linux For free distribution 133