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Thursday, November 15, 2018

ITAB Notes


Unit – 1: Information Technology
Information Technology
Information Technology (IT) is a generic term that covers the acquisition, processing, storage and dissemination of information. It involves the application of computers and communication technology in the task of information handling, information and information flow from the generation to the utilization levels. It is restricted to systems dependent on microelectronics based combination of computers and telecommunication technologies. The IT is the boon for mankind. It gives accessibility to information at fingertips. There has been discussion on Information highways and high tech libraries. The promising and diversified possibilities of IT have reduced the space and time between the people, countries, continents and ultimately have led to the emerging concepts - Global Society and Global Village.
Information Technology (IT) is a new technology applied to the creation, storage, selection, transformation and distribution of information of many kinds. It has been defined differently by different people.
IT, as defined by the Information Technology Association of America (ITAA), is "the study, design, development, implementation, support or management of computer-based information systems, particularly software applications and computer hardware." It deals with the use of electronic computers and computer software to convert, store, protect, process, transmit and retrieve information, securely.
According to Mall, IT means various means of obtaining, storage, and transforming information using computer, communication and micro-electronics.
UNESCO defines IT as, scientific technology and engineering disciplines and the management techniques used in information handling and processing their application, computers and their interaction with men and machines and associated social, economic and cultural matters.
Objectives of Information Technology
The objectives of IT are to provide better means of information of data messages in the form of written or printed records, electric, audio or video signals by using wires, cables and telecommunication techniques, IT plays a vital role in information handling due to developments such as reduction in computing time, capabilities of files on video discs, use of T.V as readymade information screen, telecommunication and satellite communication facilities etc. The objectives of IT can be categorized into the following four groups.
(i) Supporting technical functions associated with acquisitions, technical processing, serial control, SDI/CAS, OPAC and circulation work.
(ii) Supporting information storage, retrieval and dissemination systems.
(iii) Supporting management information services for libraries, especially analyzing library statistics.
(iv) It can best be used in service and orientation courses for practicing librarians, continuing education programs for faculty teachers of library and information science, correspondence studies and library extension services.
Features of Information Technology
Information Technology possesses various features. Let us have an idea of its features.
1.       Broadness: IT involves more than just computer literacy. It takes into account how computers work and how these computers can further be used not just for information processing but also for communications and problem solving tasks as well.
2.       Streamlining: IT has the feature of streamlining the processes. It helps in streamlining the business processes. It also helps in getting constant and up to date information in real time.
3.       Globalization: IT is global. It not only brings the world closer together, but it allows the world’s economy to become a single interdependent system. This means that we can not only share information quickly and efficiently, but we can also bring down barriers of linguistic and geographic boundaries. It makes the word into a global village.
4.       Communication: IT helps in cheaper, quicker and more efficient communication. We can now communicate with anyone around the globe by simply text messaging them or sending them an email for an almost instantaneous response. The Internet has also opened up face to face direct communication from different parts of the world thanks to the helps of video conferencing.
5.       Cost effectiveness: Information technology helps to computerize the business process thus streamlining business to make them extremely cost effective. This in turn increases productivity which ultimately gives rise to profits that means better pay and less strenuous working conditions.
6.       Bridging the cultural gap: Information technology helps in bridging the cultural gap by helping people from different cultures to communicate with one another and allow for the exchange of views and ideas, thus increasing awareness and reducing prejudice.
7.       More time: IT has makes it possible for businesses to remain open 24x7 all over the globe. This means that a business can be open anytime anywhere, making purchases from different countries easier and more convenient. It also means that you can have your goods delivered right to your doorstep with having to move a single muscle.
8.       Creation of new jobs: IT creates new and interesting jobs. Computer programmers, System analyzers, Hardware and software developers and Web designers are just some of the many new employment opportunities created with the help of IT.
9.       Dynamic: IT is dynamic and ever changing. It has continuously changing features due to development in the field of communication and content technology.
Components of Information Technologies
Technological change is becoming a driving force in our society. Information technology is a generic term used for a group of technologies. The following are the major new technologies as most relevant information system.
Ø  Processor, memory and input/output channels,
Ø  Micro, Mini and Large scale computers,
Ø  Mass storage technologies,
Ø  Data communication, networking and distributed processing,
Ø  Data entry, display respond and
Ø  Software
These technologies can also be grouped into three major areas:
1.       Computer Technology.
2.       Communication Technology (Refer below – ICT)
3.       Content Technology.
Computer Technology: The present era is IT era where computers are performing their dominant role. We find presence of computers in every field. A computer is an electronic device which converts raw data into meaningful information by following a set of instructions called program. Computers can be classified into different categories. Of these categories personal computers, workstation, servers and super computers are very important. Personal computers are IBM compatible computers and are used by one person at a time. The common components of computer system include input unit, central processing unit and output unit. Input unit is used to enter the data in computer. It includes mouse, light pen, tract ball etc. Central Processing Unit is the main and central unit of the computer that controls the working of the Arithmetic Logic Unit and Memory Unit. Output unit produces the results which are displayed either on the screen or are printed through printer. A computer system is composed of hardware and software. Various hardware parts include memory, input devices, floppy and hard disk, pen drives, CD or DVD drives etc. Memory is an essential element of computer. RAM is internal memory and volatile in nature. Cache memory is a part of memory which uses static RAM and helps the processor to search the data at a very high speed.
Computers play an important role in data processing. They take raw data as input and after processing, provide meaningful information to the user. Electronic data processing comprises the role of computer which is composure of hardware and software. Data can be processed electronically at a wonderful speed and accuracy. This helps in providing timely reports to the management and these reports are very helpful in taking decisions for future. The processing of data can be done in two ways; one is on-line processing and the other is off-line processing.
Content Technology: The media and entertainment industries are undergoing significant structural change. Content + Technology interprets in depth the management and technology issue confronting today’s media companies for managers, operators and engineers from Software to Hardware, Regulation to Practice, Established and Emerging Standards.
Content technology or multimedia technology includes computer-based, interactive applications having multiple media elements, including text, graphics, animations, video and sound. Content technology refers to both the hardware and software used to create and run such systems. The mode of delivery for each application depends on the amount of information that must be stored, the privacy desired and the potential expertise of the users. Applications that require large amounts of data are usually distributed on CD-ROM or DVD-ROM, while personal presentations might be made directly from a computer using an attached projector. Multimedia products may be created and run on the commonly used computer environments. Multimedia system users may employ a variety of input devices in addition to the keyboard and mouse, such as joysticks and trackballs. Touch screens provide both input and display capabilities and are often the choice when potentially large numbers of novices may use the system. Other display devices include high-resolution monitors and computer projectors.
Impact and Use of information technology in business
Small scale business houses need to buy software packages that could cater to their specific management, operational and functional needs. For this purpose, they need to approach firms and IT manufacturers who deal in such software applications. Other IT services include Internet marketing and email marketing, web hosting and promotions and maintaining client networks. Larger business houses have their own operational and functional employees who develop in house software applications and work on several IT needs of the businesses. They usually purchase ERI software programs to coordinate different processes and functions into a single application, which is actually more convenient. Manufacturing businesses may make use of servers and databases to store their vast data regarding inventory.
The information technology role in business sector certainly is of a great importance, which enables businesses to effectively and successfully plan, manage, execute strategies to lead to profit. Information Technology has proved to be a very crucial for business activities. It has introduced various new technological applications and tools that ha increased productivity and efficiency in business organizations. Information technology has facilitated easy and quick modes of communication. Let us see as to how I.T. has revolutionized this area. Some of the significance of It in business are given below:
1. Advertising: Information technology has introduced several new methods of advertising through the Internet. Business firms increase their income through these methods of advertising. Business can be increased by advertising on popular websites.
2. E-Commerce: One of the revolutions brought by Information Technology is E-Commerce. E-Commerce or E-business refers to buying and selling of goods or services through the Internet. These days, countless businesses offer online services. Some types of online businesses include consumer-based retail sites and the exchange of services and trading goods between corporations.
3. Communication: Employees and workers in organizations use emails, instant messages and video conferencing for quick and effective communication which improves the quality of work and improves business potential.
4. Applications: Most business organizations use software programs such as MS-Word, MS-Access, MS-Excel and PowerPoint. Mostly, photo manipulation tools like Photoshop are also used by organizations.
5. Prediction: According to the website networksolutions.com, it is predicted that in the coming years, the boundaries between electronic commerce and conventional commerce will fade away as more and more businesses are moving selective sectors of operations online.
Significance of IT in education
New and emerging technologies challenge the traditional process of teaching and learning and the way education is managed, Information technology, while an important area of study in its own right, is having a major impact across all curriculum areas. Easy worldwide communication provides instant access to a vast array of data, challenging assimilation and assessment skills. Rapid communication, plus increased access to IT in the home, at work and in educational establishments, could mean that learning becomes a truly lifelong activity – an activity in which the pace of technological change forces constant evaluation of the learning process itself.
1. Access to variety of learning resources: IT aids plenty of resources to enhance the teaching skills and learning ability. With the help of IT now it is easy to provide audio visual education. The learning resources are being widens and widen. Now with this vivid and vast technique as part of the IT curriculum, learners are encouraged to regard computers as tools to be used in all aspects of their studies.
2. Any time learning: In the era of Information Technology and web networks the pace of imparting knowledge has become very fast and one can be educated any time. One can study whenever he wills irrespective of whether it is day or night and irrespective of being in India or any part of the world.
3. Collaborative learning: Now IT has made it easy to study as well as teach in groups or in clusters. With online we can be unite together to do the desired task. Efficient postal systems, the telephone (fixed and mobile) and various recording and playback systems based on computer technology all have a part to play in educational broadcasting in the new millennium. The Internet and its Web sites are now familiar to everyone.
4. Multimedia approach to education: Audio-Visual Education, planning, preparation and use of devices and materials that involve sight, sound or both, for educational purposes, is being extensively done. Among the devices used are still and motion pictures, filmstrips, television, transparencies, audiotapes, records, teaching machines, computers and videodisc. The growth of audio-visual education has reflected remarkable developments in both technology and learning theory.
5. Authentic and up to date information: The information and data which are available on the Internet is purely correct and up to date. Several hundred sites are available on the Internet which offers similar information. Internet, a collection of computer networks that operate on common standards and enable the computers and the programs they run to communicate directly, provides true and correct information.
6. Online library: Internets support thousands of different kinds of operational and experimental services one of which is online library. We can get plenty of data on this online library.
7. Distance learning: Distance Learning is a method of learning at a distance rather than in a classroom. Distance learning is easier these days as laptops and internet connectivity have given the Universities faster means of reaching more students in real time.
Uses of Information Technology in Medicine
Information technology plays important amazing roles in medicine. Using information technology in the medical field can improve efficiency and quality of care.
1. Benefits: Medical technology provides three primary benefits to the patients.
a)      It helps increase care-guidelines for specific conditions.
b)      It reduces the number of medication errors.
c)       It also improves how well medical professionals are able to track the progression of diseases within a community.
2. Storing Information: Information technology helps to organize patient records and can provide valuable cross-referencing information when it comes to things like drug interactions. Because of the rise in the number of medical images captured and used in treatment for a variety of conditions, information technology is especially important for storing images and locating them when needed. Even reading medical images may require IT assistance because of the increasing complexity of imaging technologies.
3. Trained Professionals: Information technology in and of itself is not enough to improve patient care. Hospitals, doctor’s offices and other medical institutions need trained IT professionals to implement and maintain new information technologies.
4. Privacy Concerns: While information technology can improve patient care, it can also compromise patient information potentially making personal details available to people outside of the doctor-patient relationship. Institutions implementing information technology to store and communicate information should be aware of these concerns and take steps to address them.
Social Impact of Information Technology
Computing technologies, like most other forms of technology, are not socially neutral. They effect and are themselves affected by society. Computers have changed the way people relate to one another and their living environment, as well as how humans organize their work, their communities and their time. Society, in turn, has influenced the development of computers through the needs people have for processing information. The study of these relationships has come to be known as “social informatics.”
The complete impact of the current information technology and networking revolution remains unknown, but her experiences of organizations and individuals who are using the tools and resources offered by information technology suggest that it may change out social fabric.
The twentieth century saw the development of scientific research and engineering applications that required increasingly complex computations. The needs and desires of society have subsequently influenced the development of a vast array of computing technologies, including supercomputers, graphics processors, games, digital video and audio, mobile computing devices etc.
In the twenty-first century, computers are used in almost every facet of society including agriculture, architecture, art, commerce and global trade, communication, education, governance, law, music, politics, science, transportation and writing. In general, computing technologies have been applied to almost every situation.
Impacts on Various other Organizations
1.       Banking Industry: Banking sector is one of the largest organizations which invest heavily in computers. Today, the banking functions in urban and semi-urban areas are fully computerized. Computerization in banking industry is necessary due to massive volume of transactions and to offer better and better customer service to the customers. Banking industry is facing stiff competition from the foreign and private banks. The technology being used by the foreign and private banks is much advanced as compared to public sector banks. This has compelled public sector banks to go in for adopting the latest technology. Computers are being installed in branches at different counters viz. Savings Bank, Current Account, Cash Credit Accounts etc. Cheques are handled by the computers at clearing houses. By computerization, many problems have been solved. Balances are automatically tallied in the accounts. Customers can obtain printed statements of their accounts. Automated Teller Machines have been installed in the branch premises of various banks and at the places of customer activities. Different networks viz. BANKNET, RBI NET, SWIFT, INFINET etc. are being used to expedite the customer transactions and to provide better customer service. National Electronic Funds Transfer (NEFT) and Electronic Clearing Service (ECS) have been started to minimize the time of funds-transfer and funds-credit in the accounts of customers with the introduction of RTGS system (Real Time Gross Settlement), funds can be settled in the accounts almost instantaneously. In all banking industry is handicapped without computers.
2.       Insurance Sector: The requirements of computers in insurance sector are similar to those in banking sector. A large number of files relating to customers’ policies are to be updated. Calculation of bonus, premium and interest is to be done on a large scale. Insurance companies have to intimate to the customers who do not pay the installments in time. Matured policies are to be paid. Manually it is a tedious job to handle all these transactions. With the introduction of computers in this sector; the burden on the employees has been reduced and timely statements of accounts are made ready in no time. Computerized acknowledgements are sent to the policy holders who pay premium on their policies and date of next installment due is also mentioned.
3.       Railways: Railway is largest organization which is effectively using the computers. The record of all trains running daily or weekly is kept in computers. A passenger can desire information about a particular train at any station linked with the computer network. For example, a passenger at Trichy station can get his ticket (with return ticket) reserved for Mumbai Central. There is no separate or special queue for a particular train or destination. The passenger can obtain his ticket in any queue for any station. Similarly he can get his ticket cancelled if his programme of journey has been changed. All information regarding time table of trains can be obtained at the computer terminals.
There are numerous organizations which are going for computerization. The advantages of computerization in these organizations are mentioned below:
                     i.            Payroll preparation: In large departments, organizations, business houses, factories, etc. computer is an aid in preparing pay rolls of employees. It is very difficult to prepare payroll of all the employees in a large organization manually. Moreover there are chances of mistakes in manual calculations. Computer do not make mistake while calculating D.A., H.R.A and other allowances. Income tax calculations are performed by the computers.
                   ii.            Budget Preparation: Computers can be used for preparation of budget of an organization. Budgeting is a sensitive item for an organization. Proper financing can be done through correct budgeting. Computers can store a lot of data of all departments and sections of an organization. Based on their requirements and trend during the past budget, budget for current year can be prepared correctly and the organizations can know the variance over previous year in the budgeted items.
                  iii.            Designing and Manufacturing: Computers can design a product very efficiently. This technique of designing is called Computer Aided Designing (CAD). Various software packages are available for designing a product. Programs like Auto Cad, CorelDraw etc. are very popular among computer users (designers). If one design is not approved, computer can immediately gives you another design according to your specifications. Once the design is approved, the product is manufactured. Computers are very helpful in controlling the manufacturing phase. With the help of Computer Aided Manufacturing (CAM), the manufacturing of the product is very easy. Whole of the manufacturing process is taken over by the computers and robots. Not only the use of CAM avoids wastage but also brings high quality improvement in the product.
                 iv.            Material Handling: In the manufacturing process, computers can handle the materials properly. The handling of materials by computers is very accurate and evens the chances of damage and accidents are negligible. Robots are used to handle the extremely dangerous and hazardous materials, acids etc. and avoid accidents.

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