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semi-public documentationinformation centresestablished by learned or professional societies trade associations industrial undertakings etc they
public documentationinformation centresestablished from public funds these may not be self- supporting financially in developing
types of documentation and information centres documentation and information centres are discussed here under three broad groups they
relationship to librariesdocument collection is a major function of all information service units libraries are traditionally known to be centres
information centres and databases a organisation selects acquires stores organises a--retrieves specific documents to meet users
documentation and information centres and databases traditionally libraries have been collecting various kinds of publications and
organisation of information servicesdocumentation and information services are activities that grew out of information needs of user communities
document delivery service the primary responsibility of the library is to provide the user with the texts we may call them original documents
reprography servicewe have already mentioned above that if the original document is not available its photocopy is provided by a document delivery
translation service one of the constraints in the flow of information is the language barrier about half of worlds literature is published in
reference service notwithstanding library catalogues and various other aids available for exploiting the library resources users would
literature searching servicethere are occasions when users want to know everything that has been published on a subject the most important reason
indexing and abstracting serviceswe have already discussed in section the indexing and abstracting publications as secondary documents the topic
selective dissemination of information sdithe sdi is a type of current awareness service the objective of which is to keep users of the system
current awareness service cas for any active researcher it is absolutely essential that he keeps himself up-to-date in the field of his work in
information servicesin that part we shall discuss eight types of information services current awareness service cas selective dissemination of
user groups and their specific needs- information behavioura user groups and their specific needs you will see in details in unit 5 section 31 the
methods of assessing information needsas mentioned above there are two sets of methods one used in user studies for analysing verbal behaviour and
information behaviourbriefly information behaviour means the way users seek information the way they go about finding it and the way they use it
user needs and use and user studieslibraries information centres and databanks are now known as information facilities which exist for the benefit
referral centresa referral centre is some sort of information desk for the scientific and technical community which does not provide enquirers
information analysiscentres an information analysis centre iac has been defined as an organization which indexes abstracts translates reviews
online database serviceswe shall be referring to online databases most of the well-known indexing and abstracting services are now available both
indexing and abstracting serviceswhile the compilation and publication of an indexing and abstracting service in itself is an information service
information centresit is now customary to establish documentation cells within many special libraries to provide different types of information