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• • Operating system
  • most important type of system software
• Operating System is an integrated set of specialized programs that is used to manage the overall operations of a computer
• Operating system - acts like an interface between the user, computer hardware and software.
• DOS (Disk Operating System), Unix, Linux and Windows are some of the common operating systems.
• Compiler software

  • Translates the source program (user written program) into an object program (binary form).
• -Specific compilers are available for computer programming languages like FORTRAN, COBOL, C, C++ etc.
• Application software consists of programs designed to solve a user problem
• Application Software

  • It is used to accomplish specific tasks rather than just managing a computer system.
• Application software are inturn, controlled by system software which manages hardware devices.
• Examples of Application software

  • railway reservation system, game programs, word processing software, weather forecasting programs.
• Commonly used Application Software packages:

  ·         Word processor

  ·         Spreadsheet

  ·         Database management system

  ·         Graphics
• Word Processing software

  • more than a fancy typewriter
• Word processing software:

  • Advantage: can make changes without retyping entire document
• Word processing software:

  • This software lets you create, edit, format, store, print text and graphics
• Word processing software examples

  • microsoft word
  • wordstar
  • wordperfect
• Spreadsheet software:

  ·         Allows the user to manipulate numbers
• Spreadsheet software:Perform repetitive numeric calculations
• Spreadsheet software

  • Allows trying different combinations of numbers quickly