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NON CONVENTIONAL OR MODERN FORMIntroduction:

The change in form of documents from

book to non book material such as micro films and

more recently CD-ROM and multi media interactive

computer words and text files on internet has

influenced a traditional forms of catalogues. Physical

forms of catalogues have undergone a drastic changeswith the result. Various non conventional

sophisticated forms of physical forms of catalogues

have been developed to make the work of information

retrieval exhaustive and expedition.



TYPES OF NON-CONVENTIONAL FORMS

The different types of non

conventional forms are as follows,

Visible index form

Micro form

On-line OPAC formMachine readable form ( MARC )



VISIBLE INDEX FORM

Visible index catalogueconsists of strips mounted on a frame ofcards held flat hinged and with edge of eachcards producing so as to make the heading

visible. The cards are usually of the size 12.5 20 cm; the card is inserted into a hingedKraft pocket exposing the top portion, thesepockets are in a specially prepared steel

cabinet

Office type equipment which may consist ofstrips mounted in a frame are cards held flat,

hinged and with the edge of each cardprojecting to make the heading visible.



ADVANTAGES:

In the visible index, it is easy to internet the

new entries, so it can easily be kept of

up-to-date.

It is easy to consult.

Filling is easy.

It is easy to guide.

Much member of entries can be seen at a

glance.



DISADVANTAGES:

It is difficult to produce multiple copies.

The insertion of new entries will be some

what in convent.

The tray must be pulled out to its fullest

extent and the require index is to be

searched. So it is difficult to consult.



MICRO FORM

The catalogue in which entries

are generally reduce printed upon film. A

suitable reader which magnifies the films

and project it on to a screen is requiredmicrofilm may be on a single reel but more

usually it is housed in cassettes. It containing

two reels so that the film can be would backwords and forwards with in its container.



Micro form catalogue

entries are greatly reduce and printedupon a film or fiche. The microform

catalogue cannot be ready by naked

eyes. A suitable microform readersmagnifies the reduce images on the

film or fiche and project them and to a

screen is necessary a form consultinga microform catalogue.



ADVANTAGES:

Microform catalogues are easy to use andmaintain.

These are compact and occupy less space in

the library. They are portable and accessible to users

depending upon number of copies of

catalogues and the machines available. It is easy to keep up-to date

Multiple copies can be produced easily.



DISADVANTAGES:

Only one person can use a microform reader

at any one time

It is a costly affair for small libraries

It requires a machine to read

These can not be used without microform

readers.

These requires special care and protection

form heat, light and sun.


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OPAC FORM

OPAC is the newest mostsophisticated catalogue format is stored in acomputer memory and displayed an a

monitor ,OPAC can be accessed via acomputer terminal such catalogue allow anyperson to brows the catalogue to knowwhether library has got specific title of

document and if library is using an integratedlibrary software package. Even it is easy toknow the person holding the book .hencereminder can be effected .in other words inOPAC user is connected directly to the

information sources.



ADVANTAGES:

It is easily updataed.

It can easily provide cross reference for

authors and subjects.

New access points and search capabilities

can be added at any times.

Studies of pattron use of operating online

catalogues show a high level of users

satisfaction.



DISADVANTAGES:

The catalouge should be easy and

convenient to use.

Catalouge should be compact in shape.

To keep the catalouge upto dated.

Safety of catalouging data on harddisk

problem.

Systems failure hinders access to the

catalouge and hence the collection.



MACHINE READABLE CATALOUGE [MARC]

In a machine readable catalouge entriesare rendered a format which permits input andstorage on magnetic tape or magnetic diskmanipulation in a computer. MARC format , the

history of format goes back to the late 1960, when thelibrary catalouges and other research librariesrecognised that computerprocessingof biblographicinformation had to be employed in order to solveproblems such as cataloguing backlogs,and to

provide better services to readers.This let to adoptionof the MARC-I communication format for exchange ofbibliographic data amoung libraries in 1967.



ADVANTAGES:

It can be kept updated with speed and

efficeincy.

It can search for any bibliographical

element such as authors, subjects, price

etc.

It is a user friendly.

It can be easily multipled.



DISADVANTAGES:

The any disadvantages of

computerised catalouges particularly in india,

this is the accute shortage of man power to

design and operate machine-readablecatalouges, usres should be turned to the

computerised systems to exploit to fully the

capability of machine readable catalouge.



THANK YOU

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