Need for Literature Search:
While the scientific and technical literature has been growing exponentially, the amount of time that any user has for reading this literature remains more or less the same. Clearly, no research worker, unlike his predecessors who knew everything worthwhile in their field of specialisation, is able to keep abreast of the latest developments in his field of specialisation. To keep abreast of such developments he often needs the help of information specialists. These developments, the knowledge of which is so essential, get recorded in the literature devoted to the respective subject disciplines. The vastness of this literature and the lack of time for the user to look it up create a gap between him and the information he may find useful., Literature search is the means to bridge this gap. Thus, the main function of an information service facility is to bring together the user and the information he needs.