TAILIEUCHUNG - Lecture Introduction to computing - Lecture 24

The contents of this chapter include all of the following: Purpose of information systems, types of information systems, expert system, information systems technology, virtual private network, information systems hardware,. | CSC 101 Introduction to Computing Lecture 24 Dr. Iftikhar Azim Niaz ianiaz@ 1 1 Last Lecture Summary I WWW and Multimedia Graphics Animation Audio Video Virtual Reality Plug-In Web Publishing E-Commerce Business to Consumer Business to Business Intranets and Extranets Security and Secure Web Pages 2 2 Last Lecture Summary II Other Internet Services E-mail Instant Messaging Chat and Chat rooms News and Newsgroups VoIP FTP P2P API and Network Drivers Rules of Netiquettes 3 3 Objectives Overview 4 4 Application Software Application software consists of programs designed to make users more productive and/or assist with personal tasks Categories of Application Software Application Software Available in a variety of forms: Packaged Software Also called commercial software Software that must be purchased Copyrighted retail software that meets the needs of a wide variety of users, not just a single user or company is an application that performs only one type of task, such as a word processing program, a graphics program, or an e-mail program might have many tools and features, but it basically focuses on one type of task or a range of related tasks. Packaged software is available in retail stores or on the Web. Custom Software Also called stand alone software Performs functions specific to a business or industry Solves one type of problem Sometimes a company cannot find packaged software that meets its unique requirements In this case, the company may use programmers to develop tailor-made custom software Usually costs more than packaged software. Web Application A Web site that allows users to access and interact with software from any computer or device that is connected to the Internet Many Web sites provide free access to their programs Some charge a fee Types of Web applications include e-mail, word processing, tax preparation, and game programs. Open Source Programs distributed for use with source code Allows users to modify the software and .

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