e1 - Consider an automated library circulation system....

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Consider an automated library circulation system. Every book has a bar code, and every borrower has a card bearing a bar code. When a borrower wishes to check out a book, the librarian scans the bar code on the bok and on the borrower’s card, and then enters the C at the computer terminal. Similarly, when a book is returned, it is again scanned and the librarian enters R . Librarians can add books (+) to the library collection or remove them (-) . Borrowers can go to a terminal and search for all the books in the library collection by a particular author (the borrower enters A= followed by the author’s name), all the books with specifc words in the title ( T= followed by the title words), or all the books in a particular subject area ( S= followed by the subject area). Finally, if the borrower wants a book that is currently checked out, the librarian can place a hold on a book so that when it is returned, it will be held for the borrower who requested it ( H= followed by the unique number of the book). Certain books in the collection may be restricted to reference use within the library
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e1 - Consider an automated library circulation system....

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