, . excite.com, yandex.ru.
, Web- . . , .
, , , , , . , .
. , .
(metasearch engines). , , .
. metasearch.com, , . , (files.ru), (whowhere.com) . .
WWW , . () , , www.medexplorer.com, www.mwsearch.com, www.rxlist.com, www.medpoisk.ru, , www.mededucation.com.
4.3.
2 .
4.3.1. Google (www.google.com)
. , . . Internet. .
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4.3.2 Yandex (www.yandex.ru)
Yandex.
Yandex , . , , " ", Yandex .
. , , , ( , ). ( ), , ( description), ( URL) ( URL).
. Yandex . , : () . Yandex ( su, ru, am, az, by, ge, kg, kz, md, tj, ua, uz), , . .
.
4.4.
. , . "" "" . , . , " " " ". . , " -" , "".
. , , , . . , ( " "). - ? , .
. , . , "" " " "". - - . (|). , . , "" "||".
. , , , . , . . , " ".
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. , , " ". . , , .
"+" "-". , , . , , . , . , -, ( , , ) , "+ + ".
. . , , , , . . .
. . , ! , "", .
. , , .
, , , .
Internet Web-, telnet- , . , , , .
E-mail, . ., . ., , - .
5