1. Information service Meaning:
Giving information to user in anticipation or in demand is known as Information service.
Aspects of Information service:
Provision of Information on demand
Provision of Information in Anticipation

2. Types of Information Service
Current Awareness Type
Condensation type (Abstracts, Extract, Technical Digest)
Location Type (Indexes, Bibliographies, Hand book, Data Service)
Evaluation Type (state of the Art of Report, Trend report)
Condensation and repacking type ( Reviews, Handbook)
Reference type ( Reader’s Guidance, Ready reference, Referral Service)
Maintenance Service ( Training of Document, Consultation ).

3. ALERTING SERVICE Meaning:
Alerting service is a service to be in a state of alertness of information resources and information products.
Types:
Group Alert Service
Individual Alert Service

4. Current Awareness Service
Dr S.R.Ranganathan defines,
CAS as “listing the documents appearing during the period covered, and without being selected to suit the requirements of a particular reader or a specific topic under investigation. This is of the nature of a general appetizer. It endeavors to keep the clientele informed promptly of all the nascent thought created in their fields of work and related fields.”

5. Characteristics of CAS
Latest information
Continuous process of keeping the user
abreast of the latest information.
Broader than the subject area of the user.
Speed or timeliness
Receives from his own informal channels.
Temporary use.

6. Forms and Formats of CAS
Journal-Circulation
A. Circular Routing B. Radial Routing
List of Periodicals Received
Current content Service
Current Awareness List (CAL):
Library bulletin
Announcement of Research – in- progress
Notification of Forthcoming meeting
Daily intelligence service
Newspaper Clipping Service

7. SELECTIVE DISSEMINATION OF INFORMATION (SDI)
Hans Peter Luhn (1958)
Strauss defined:
“ SDI as a refinement of the current awareness idea… that is designed to serve the individual scientist directly”

8. Steps involved in SDI system
User profiles
Documents profile
Matching the specific subject interest;
Notified
Connecting the right recipients with the right items of the information
Responses of the recipients
Adjusting the profile
Notifying
Keeping the file of profiles

9. REFERRAL SERVICE
The referral service provides only source to information and no more.
Referral Centre
It directs users for information and data to appropriate sources such as Libraries, Documentation centers, Information centers

10. Reference Service
Dr. S.R.Ranganathan defines reference service as “the process of establishing contact between a reader and his document in a personal way”
From 1896, in USA reference service occupied a regular place in the programmes of the various conferences of American Library AssociationIn India

11. Theories of Reference Service
Conservative or Minimum Theory : The main function of a librarian is not to find answers to question or to interpret the material to the reader but to organise the material effectively and to teach the enquirers to help themselves.
Moderate or Middling Theory : It is a mixed kind of reference service. It provides aid to the readers in locating and using books, finding facts and giving information whenever possible.
Liberal or Maximum Theory :. This theory states that the proper subject knowledge and sound bibliographical training help the librarians to become specialist in finding out information

12. Functions of Reference of Service
The supervision function
The Information function
The Guidance function
The Instruction function
The Bibliographic function
The Appraisal function

13. Types of Reference Service
Ready Reference Service (very short time)
Long Range Reference Service

14. BIBLIOGRAPHIC SERVICES
Bibliography
Louis shores “It is a List of written, Printed or otherwise produced Record of Civilization, which may include books, serials, pictures Manuscripts and any media of communication”
Compilation of Bibliography:
Planning
Preparation
Types
Enumerative (Examination of individual books in order to assemble the resemble. Like incunabula,
Analytical (critical)
Historical (Documents as objects of art)

15. DIGEST SERVICE
Ascertaining they exhaust status at a particular point in time

16. INDEXING SERVICE Importance:
Index is a detailed alphabetical list of the names, terms, topics, places, formula “
Importance:
Guides the user to document
To create specialization of the author
To retrieve the reference for research
To save time

17. Types Name index Author index Subject index Document index,
Book periodical, News index
Bibliographical index
Classified index
Alphabetical index
Specific and Relative index
Current and Retrospective index
Citation index

18. ABSTRACTING SERVICE Meaning
Essence of summary of a document is loosely called abstract
Type of abstract
1. Indicative Abstract
2. Informative Abstract
3. Indicative and Informative Abstract
4. Slanted Abstract
5. Critical Abstract
6. Titular Abstract
7. Author Specialist Abstractor
8. Aritcle, patent Standard and Bibligraphical Abstract etc..

19. Preparing an Abstract 2.Organisation of the identified information
1. Indification of significant information
2.Organisation of the identified
information
3. Writing of Abstract
Qualities
1. Brief
2. Simple
3. Precise

20. TREND REPORT
A trend report is an exposition of a subject, giving an account of the general direction of research in the subject, based on a review of the documents on current developments. The trend report service is designed to help the specialized reader in the productive utilization of his time and in the conservation of the research potential.

21. Steps in the Preparation of Trend Reports
The Work in the idea plane involves
The work in the Verbal Plane Involves
The work in the Notational Plane Involves

22. ONLINE SERVICES
Online service means the provision of facilities of online searching of bibliographic or non bibliographic databases using remote terminals.
ONLINE SERVICES IN INDIA:
An online service in India was perceived by NISSAT way back in 1985 which load to the establishment of several National Access Centers for International database (NACIDS).
Online services available in India are medical information service of NIC, National Union Catalogue of Scientific Serials (NUCSSI) of INSDOC,

23. TRANSLATION SERVICES
Meaning
To express the information in another Language systematically retaining the original
-Webster
Objectives
To provide document in user Language
To Promote the Use of document and cultural understanding
Types of Translation
Literal (Without changing the Literary Meaning)
Free Translation (Translators apply his own words)
Transposition (Translators apply his emotional)

24. Translation Pools 1. National Translation Centre (NTC)
Established in John Creamer Library, Chicago in 1953
2. International Translation Centre (ITC)
1960 by the name European Translation Centre (ETC)
3. Agencies in Britain
British Library is a big stockist of translations
4. Specialized Pools
a) Transtom: EAEC (European Atomic Energy Community) and US Atomic Energy
b) Index Translationum: published by UNESCO. ITS publication is regular since 1947

25. REPROGRAPHIC SERVICES(1954 )
Bose defines “it is a group of mechanical devices whereby one or multiple copies of a document can be prepared through copying and duplicating processes
Reprographic Techniques
a) Photographic
b) Non – Photographic :
01. Exam race
02. IGNOUmaterial