TAILIEUCHUNG - Lecture Introduction to computer and programming - Lecture No 2

This chapter defines system software and discusses two types of system software: operating systems and utility programs. You learn what an operating system is and explore user interfaces, operating systems features, and operating system functions. | CSC103: Introduction to Computer and Programming Lecture No 2 1 Today’s lecture outline Computer software Operating system software Application software Understanding computer operation To become familiar with number system used by the microprocessors - binary numbers To become able to perform decimal-to-binary conversions Logic operations Computer Software Computer software is the key to use computer productively. Software can be categorized into two types: Operating system software Application software Operating System Software Operating system software tells the computer how to perform the functions of loading, storing and executing an application and how to transfer data Nowadays, computers use an operating system that has a graphical user interface (GUI) Image 1 Image 2 Cont. GUI provides visual clues such as icon symbols to help the user. Microsoft Windows XP, Vista and 7 are widely used graphical operating system. DOS (Disk Operating System) is an older Application software Application Software consists of programs that tell a computer how to produce information. Some of the more commonly used packages are: Word processing Electronic spreadsheet Database Presentation graphics Word Processing Word Processing software is used to create and print documents. A key advantage of word processing software is that users easily can make changes in documents. Electronic Spreadsheets Electronic spreadsheet software allows the user to add, subtract, and perform user-defined calculations on rows and columns of numbers. Database Software Allows the user to enter, retrieve, and update data in an organized and efficient manner, with flexible inquiry and reporting capabilities. Presentation software Presentation graphic software allows the user to create documents called slides to be used in making the presentations. Using special projection devices, the slides display as they appear on the computer screen. Computer Components and Operations Input devices: allow data to enter

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