Introduction to Computer Software S. Sabraz Nawaz, MCP Lecturer in MIT

In this lesson After completing this lesson, you should have clear understanding on What is computer software System software Operating system and its functions Utility programs Language Translators By: S. Sabraz Nawaz, Lecturer in MIT

Computer Software A set of programs that are specifically written to provide the user a precise functionality like solving a specific problem is termed as a software package Tells the computer what to do and how to do it. instructs to display on the user’s screen what kinds of input to take from the user what kinds of output to generate. By: S. Sabraz Nawaz, Lecturer in MIT

Categories of Software System software Application software. By: S. Sabraz Nawaz, Lecturer in MIT

System Software Consists of several programs directly responsible for controlling, integrating, and managing the individual hardware components Operating System Utility Programs Language Translators By: S. Sabraz Nawaz, Lecturer in MIT

Operating System A set of system programs that controls and coordinates the activities of the computer’s hardware and application. The platform on which the application software operates DOS (Disk Operating System), Windows 3.x, Windows 95, Windows NT, Windows 2000, Windows XP, Windows Vista, Mac OS, UNIX and LINUX By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System  Memory Management By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System Spooling Print Jobs By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System Configuring Devices By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System Monitoring System Performance By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System Administering Security By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System Managing Storage Media and Files By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System User Interface By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System: User Interface Command-driven: you enter commands. You type keywords or special keys on the keyboard to enter data and instructions. Example: MS DOS. By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System: User Interface Menu-driven: you select command choices from various menus displayed on the screen. Example: Windows and Mac OS. By: S. Sabraz Nawaz, Lecturer in MIT

Functions of an Operating System: User Interface Graphical (GUI): use menus and visual images such as icons and buttons to issue commands By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs system software used to perform maintenance-type tasks such as managing a computer, its devices and its programs Most utility programs are included in the operating system By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs System Diagnostics By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Backup Utility By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Data Recovery Utility By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Disk Defragmenter By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Installer/Uninstaller By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Disk Scanner By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs File Compression Utility By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs File Viewer By: S. Sabraz Nawaz, Lecturer in MIT

Utility Programs Antivirus Programs By: S. Sabraz Nawaz, Lecturer in MIT

Language Translators A language translator is a type of system software that translates a program in assembly or higher level language into machine language Assemblers: is system software that translates the assembly language program into machine language Compiler: a language translator that converts the entire program of a higher level language (source code) into machine language Interpreter: a language translator that converts each high level language statement into machine language and executes it immediately statement by statement By: S. Sabraz Nawaz, Lecturer in MIT

What we have covered What is computer software System software Operating system Utility programs Language Translators By: S. Sabraz Nawaz, Lecturer in MIT

Doubt? By: S. Sabraz Nawaz, Lecturer in MIT