A bit theory for programmers:
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Compression theory: http://www.rasip.fer.hr/research/compress/algorithms/index.html
Site for programmers: http://www.programmersheaven.com/default.htm
Links to dictionaries, thesauri, word books, translators e.t.c.
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Dictionary of Slang: http://www.peevish.co.uk/slang
Medicine dict. on-line: http://www.medicinenet.com/script/main/AlphaIdx.asp?li=MNI&p=A_DICT
Etaco on-line: http://www.ectaco.com/online
Dictionary.com: http://www.dictionary.com
Universal dictionary (Eng, Germ, Rus, It, Danish - 150 000 entries): http://www.spacecities.com/lab001
On-line multilingual: http://www.onelook.com
"Please" in over 270 languages: http://www.elite.net/~runner/jennifers/please.htm
The Internet Grammar of English - http://www.ucl.ac.uk/internet-grammar/home.htm
Books on-line: http://www.bibliomania.com/
Art:
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Bodyscape gallery: http://www.lavondyss.com/bodyscapes/gallery/gallery.html
Act art: http://www.artphoto.com/gallery.html
Students art pages: http://photoweb.fanshawec.on.ca/2002/index.htm
Music, video, software, drivers:
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File search engine: http://www.filesearch.ru
Not pop-music(on-line): http://www.radio1.cz
Lot of music on-line: http://www.radiofreevirgin.com/channels
If you want to download everything you want ;) : http://www.kazaa.com
Other:
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Personality test: http://www.passionup.com/fun/fun154.htm
Thousands of jokes in many catergories..: http://www.jokes.com/
Funny flash movies..: http://www.joecartoon.com/
Bikini: http://www.bikini-babes.cc/posts/april18.htm