Dave Lag wrote (in "Re: [OT] Light running backward?"):

>>>Also at that time, considered the Dewey Decimal System to be universal.
>> 
>> It's a bit more global than the World Series <g>, but apparently not the
>> only player in town outside the USA. See e.g. http://www.udcc.org/
> 
> Very interesting, had my wife take a quick look- seems to an 
> extension/standardization to the LC (Library of Congress)?

Allright... now we have three common classification systems:

- Dewey Decimal Classification (DDC,
http://en.wikipedia.org/wiki/Dewey_Decimal_Classification)
- Universal Decimal Classification (UDC,
http://en.wikipedia.org/wiki/Universal_Decimal_Classification)
- Library of Congress Classification (LCC,
http://en.wikipedia.org/wiki/Library_of_Congress_Classification)

All were created apparently more or less in parallel and with more or less
cross-pollination in the last decades of the 19th century. UDC seems to be
the only one to classify relationships between different classes in one
item, and the number-based system that DDC and UDC use seems to be better
suited for computerized handling.

Gerhard

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