I have several questions about library and information science.
Here are some tips for constructing searches that can help to answer these questions.
For your first question,
factors contributing to information system failures in organizations,
Follow the link below to our list of Ebsco Databases. Of the ones available from COM Library, Academic Search Complete and Library, Information Science & Technology Abstracts are the best ones to search for this subject.
In the databases, you could try searching for information system failure, or narrower searches such as DE "SOFTWARE failures" or DE "INFORMATION storage & retrieval systems" AND failure.
For books, go to our book catalog WorldCat via the link below and search for information system. Then, from the list of topics on the left of the screen, select Library Science.
For analyze the global trends contributing to the changing roles of information scientists in developing countries,
You could try combining the subject heading information scientists with various other words, such as DE "INFORMATION scientists" AND roles or DE "INFORMATION scientists" AND globalization.
For books, you could start with a search for information science and then limit to library science under the topic list. There are some books about library and information science careers, and they may discuss the changing nature of the work.
For benefits that accrue from library stock classification by subject
For articles, you can try searches such as DE "CLASSIFICATION -- Books", DE "CLASSIFICATION -- Books -- Library science", or DE "SUBJECT headings", or combinations of similar terms, in Ebsco.
For books, try searches like subject cataloging or library classification.
As for compare and contrast the Library of Congress and the Dewey Decimal Classification Schemes,
It's up to you to compare and contrast the two, but you can find articles about them in Ebsco by searching for DE "LIBRARY of Congress classification" and/or DE "DEWEY Decimal classification". There is also a lot of information about the systems available online, such as on the Library of Congress homepage.