INTRODUCTION OF SYSTEM & APPLICATION SOFTWARE Chapter 2 1Dr. BALAMURUGAN MUTHURAMAN

OPERATING SYSTEM (OS) An operating system, or OS, is a software program that enables the computer hardware to communicate and operate with the computer software. Without a computer operating system, a computer would be useless. 2Dr. BALAMURUGAN MUTHURAMAN

OS 3Dr. BALAMURUGAN MUTHURAMAN

SYSTEM SOFTWARE - OS  Controls computer functions Hardware Processor Memory Devices  Provides means for software to work with the CPU  Responsible for management, scheduling, and interaction of tasks  Provides user interface 4Dr. BALAMURUGAN MUTHURAMAN

TYPES OF OPERATING SYSTEM » Graphical User Interface (GUI) » Multi-user » Multiprocessing » Multitasking 5Dr. BALAMURUGAN MUTHURAMAN

 GUI - Short for Graphical User Interface, a GUI Operating System contains graphics and icons and is commonly navigated by using a computer mouse.  Multi-user - A multi-user operating system allows for multiple users to use the same computer at the same time and different times. 6Dr. BALAMURUGAN MUTHURAMAN

 Multiprocessing - An operating system capable of supporting and utilizing more than one computer processor.  Multitasking - An operating system that is capable of allowing multiple software processes to run at the same time. 7Dr. BALAMURUGAN MUTHURAMAN

THE OS FUNCTIONS  Provides a user interface  Manages the CPU  Manages memory and storage  Manages hardware and secondary devices  Coordinates application software with the CPU 8Dr. BALAMURUGAN MUTHURAMAN

D ATABASE M ANAGEMENT Data is a vital part of any organization. It needs to be stored, organized, managed, accessed, protected and manipulated. Operational Use databases to: Create a book Track book sales Set salaries and wages Pay employees 9Dr. BALAMURUGAN MUTHURAMAN

Uses  Keep track of a large number of related facts  Query the data for specific information  Retrieve information in a variety of ways Functions  Store data  Update data  Manipulate data  Retrieve data  Print data in many forms  Report on data in a variety of ways 10Dr. BALAMURUGAN MUTHURAMAN

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