Information System Reviewer

Topics: Information systems, Decision theory, Decision support system Pages: 6 (1277 words) Published: August 10, 2013
The goal of information system is to deliver the right information to the right person at the right time Approaches: 1. Pen and Paper-Based Approach (Manual Process) 2. Computer-Based Approach (Electronic Process)

Information system (IS)

➡Set of interrelated components: collect, manipulate, store, and disseminate data and information ➡Provides feedback to meet an objective INPUT - PROCESS - OUTPUT - FEEDBACK

Data, Information, and Knowledge
➡Data: raw facts; Information: processed data ➡Alphanumeric, image, audio, and video ➡Information: collection of facts organized in such a way that they have additional value beyond the value of the facts themselves ➡The Process of Transforming Data into Information DATA - APPLICATION OF KNOWLEDGE - INFORMATION

Data into Information
➡Process ‣Set of logically related tasks performed to achieve a defined outcome ➡Knowledge ‣Awareness and understanding of a set of information and the ways that information can be made useful to support a specific task or reach a decision ➡KWs ‣People who create, use and disseminate knowledge

The Characteristics of Valuable Information
accessible accurate complete economical flexible relevant reliable secure simple timely verifiable

Components of an Information System INPUT
➡the data flowing into the system from outside. ➡an activity of gathering data and capture raw data


➡Means converting or transforming data into useful outputs

➡involves the production of useful information in form of documents and reports(printed paper copy)


➡is information from the system that is used to make changes to input or processing activities.

‣predicting future events to avoid problems

Manual and Computerized Information Systems ➡an information system can be...: 1. Manual ISs ‣Example: Developing patterns and trends on graph paper for stock analysis; Manual Recording of number of hours worked and rate 2. Computerized ISs ‣Example: using program trading to track the market and trade large blocks of stocks when discrepancies occur ; Computerized Library System

Computer-Based Information System

➡a single set of hardware, software, database, telecommunication, network, internet, people, and procedures configured to collect, manipulate, store, and process data into information

I. Hardware ➡computer equipment used to perform input, processing, and output activities. ➡Example: ‣keyboard, Mouse and other pointing devices ‣Automatic scanning devices (UPC Reader) ‣Magnetic ink character recognition reader (MICR) ‣Optical Mark Recognition (OMR) ‣voice-response technology

IBM computer (U.S. Livermore National Laboratories) – fastest in the world , 300 teraflops ( 300 trillion operations per second) Blue Gene – super fast computer($40million) Kraken –World’s fastest academic supercomputer K Supercomputer – 2011-2012, world’s number one supercomputer with 10 petaflops Jaguar – 2011-2012,world’s number 3 supercomputer with 1.75 petaflops

➡Microcomputer output devices: Printer and Monitor Printer Kiosk – used to print pictures by inserting the memory card or disks. EDRs – used to monitor vehicle operation II. Software ➡computer programs that govern the operation of the computer ➡Types: 2. System Software - uses for day-to-day maintenance 3. Application Software - use for day-to-day application ➡ Operating system - most essential software ➡ MS DOS (MS disk operating system) - operating system stored in a disk ➡ - the first electronic communication software III.Database ➡organized collection of facts and information consisting of 2 or more related files. IV.Telecommunication ➡electronic transmission of signals for communications V. Network ➡connect computers and equipment in a building, around the country, and around the world VI.Internet ➡world’s largest computer network ➡1991 ➡Popular Internet Application Program: Mashing - Play 2 or more songs simultaneously Web Blogs (blogs) – sharing of...
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