Introduction to Information Technology (IT)

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Introduction to Information Technology (IT)

  1. 1. DATA:DATA ARE SET OF IOSOLATED,UNRELATE,UNINTERPRATED RAW FACTS. INFORMATION:INFORMATION REFERS TO MEANINGFULL DATA.IT IS A SET OF ORGANISED,VALIDATED,CORRECTED AND COLLECTED DATA.
  2. 2. →ADDITION OF KNOWLEGDE →DECISION MAKING AIDS →INCREASE IN PRODUCTIVITY
  3. 3. 1.VALIDITY:-The information should have minimized uncertainities to be treated as a valid information. 2.MEANINGFULNESS:-It should be meaningful in given context and for the person concerned. 3.PRECISON:-It should be concise having summarised relevant data. 4.ACCURACY:-it should try to reach maximum possible accuracy
  4. 4. 1.FORM UTILITIES:-As the form of information more closely matches the requirements of decision maker , its value increases. 2.TIME UTILITY:-Information has greater value to the decision maker if it is available when needed. 3.ACCESSIBILITY:-Information has greater value if it can be accessed or delivered easily 4.DECISION MAKING POTENTIAL:-If it provides help to make an effective decision with minimum cost , time and effort ,such information ha more value.
  5. 5. 1.Physical data concept:-It refers to the manner in which data is recorded physically on hardware. 2.Logical data concept:-It is the manner in which data are presented to the application programmer.
  6. 6. BYTE:-A byte is a group of eight bits and is used to store a character. DATA ITEM:-A data item is a smallest unit of named data. DATA AGGREGATES:-It is a named collection of data items within a record and refers to a whole. RECORD:-A record is a named collection of data items which represents a complete unit of information. FILE:-A file is a named collection of all occurence of a given type of logical record.
  7. 7. Factor affecting the way of data are stored:1.Space saving 2.Minimization of Redundancy 3.Throughput 4.Data volatility 5.File active ratio
  8. 8. DEFINITION:-The techniques used to represent and store the records on a file is referred to as file organization. Three fundamental organization techniques are:1.Sequential File organization 2.Direct access file organization. 3.Index file organization.
  9. 9. Definition:-It is defined technically as a set of interrelated components that collect ,process, store , and distribute data and information and provide a feedback mechanism to meet an objective
  10. 10. Definition:-It is an organizational information system that rely on computer technology to collect, process, store, and disseminate information. It is composed of hardware ,software, data base, telecommunication ,people ,and methods.
  11. 11. BUSINESS ORGANIZATION AND INFORMATION SYSTEM

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