Chapter 3

9.1 Identify the different between Library of Congress Classification System LC. And Dewy Dewey Decimal Classification System DDC.

Library of Congress Classification (LCC) and Dewey Decimal Classification (DDC) are the king and queen that have been reigning over the kingdomof classification for several decades in America. Both of them originated in the U. S. A.; but they are different in nature and structure. Since LCC and DDC have been widely adopted by libraries outside their mother country, a comparison between them may be of interest to library patrons. It was for a unique library that LCC was formulated.

The special nature of the Library of Congress influenced the whole structure of the scheme. The Congress library consists of several collections, each housed separately; the resulting scheme is a series of individual classifications designed separately by subject specialists. On the contrary, DDC is intended for use in all sorts of libraries of various sizes with abridged editions specially constructed for relatively small
libraries of any type: public, school, and junior college libraries. It is the invention of one man, Melvil Dewey.

The most important feature in the classification is the notation, which is defined as "a series of symbols which stand for the names of a class or any division or subdivision of a class, and forms a convenient means of reference to the arrangement of a classification."* LCC notation is a mixed one, consisting
of capital letters and arabic numerals. Single capital letters are used for main classes (e.g. M for Music), and double letters ase used for main divisions (e.g. ML for Literature of Music). These capital letters are combined with numerals, used integrally in conventional sequence, e.g.

T Technology
TJ Mechanical engineering
248 Mechanical models

249 Erecting work
250 Prime movers in general

         On the other hand, DDC notation is a pure one, consisting of Arabic numerals with decimals. A 'three-figure minimum' is used consistently, e.g. Social Sciences are always numbered 300 not: 3 or 30. The first three figures act as a numerical guide to the arrangement order before further decimal arrangement is consulted, e.g.

9.2 Make a link to...

-The Library of Congress website: http://www.loc.gov/index.html

-British Library: http://www.bl.uk/

-Thai National Library: http://www.nlt.go.th/

-Sripatum Library: http://library.spu.ac.th/e-library/index4.html

-ASEAN Communicating website: http://www.asean.org/