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| | Encyclopedia: Ã (Site not responding. Last check: 2007-10-14) |
 | | Amateur radio, commonly called ham radio, is a hobby enjoyed by many people throughout the world (as of 2004 about 3 million worldwide, 60,000 in UK, 70,000 in Germany, 5,000 in Norway, 57,000 in Canada, and 700,000 in the USA). |
 | | The symbol "∅" (U+2205) is used in mathematics to refer to the empty set, following Bourbaki. |
 | | The TeX mascot, by Duane Bibby TEX, written as TeX in plain text, is a typesetting system created by Donald Knuth. |
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