Lecture 6 - Business data and information. After studying this chapter you will be able to understand: Data, number systems, decimal, binary number systems, bits and bytes, how computer store data? How computer represent data? | Business Data and Information Lecture 6 Summary of Previous In the previous lecture we have learnt What are the quality metrics in order to buy a monitor from a market. Size, resolution etc. Monitor technologies Strain due to wrongly choosing monitors. How to avoid strain while using monitors. Video cards and sound cards Summary of Previous We have seen a practical to set the resolution DPI settings of monitors. Today’s Topics Data Examples of data and its types. Number systems Decimal Binary Number Systems Bits and Bytes How computer store data? How computer represent data? Today’s Topics ASCII EBCDIC Unicode Information How Data is Converted into Information? Exercises Knowledge Data Sources Today’s Topics Direct and Indirect Data Sources Data Quality Matters Microsoft Word Practical Session What is Data? Data items refer to an elementary description of things, events, activities, and transactions that are recorded, classified, and stored but not organized to convey any specific meaning. Data items can be numbers, letters, figures, sounds, or images. Examples of Data Items Examples of data items are a student grade in a class, A+, A, B+, B-, etc the number of hours an employee worked in a certain week . 50, 40, 60 etc. Time . 12:30 What are the Types of Data Items? Types of Data are Text Multimedia sound files, avi etc. Numeric 0 1 2 3 4 5 Floating e 25 for scientific and engineering purposes Alpha Numeric A12, CIIT-Fall-001 etc. Number System Number Systems are used for, Expressing Numbers A Manner of counting Several different number systems exists. Decimal number system Used by humans to count Contains ten distinct digits Digits combine to make larger numbers As discussed in Lecture 1, a computer can understand only 1 and 0. A different number system is needed other then decimal. Hence it is a Binary Number System. How Computers Store Data? Binary number system A number system that has just two unique digits, 0 and 1 A single digit is . | Business Data and Information Lecture 6 Summary of Previous In the previous lecture we have learnt What are the quality metrics in order to buy a monitor from a market. Size, resolution etc. Monitor technologies Strain due to wrongly choosing monitors. How to avoid strain while using monitors. Video cards and sound cards Summary of Previous We have seen a practical to set the resolution DPI settings of monitors. Today’s Topics Data Examples of data and its types. Number systems Decimal Binary Number Systems Bits and Bytes How computer store data? How computer represent data? Today’s Topics ASCII EBCDIC Unicode Information How Data is Converted into Information? Exercises Knowledge Data Sources Today’s Topics Direct and Indirect Data Sources Data Quality Matters Microsoft Word Practical Session What is Data? Data items refer to an elementary description of things, events, activities, and transactions that are recorded, classified, and stored but not organized to convey any specific .
