World Download provider results:
server studio r 6 0.full.rar :: 2011-07-14 :: Speed: 989 Kb/s
server studio r 6 0 [FullVersion] :: 2011-07-10 :: Speed: 1829 Kb/s
[HIGHSPEED] server studio r 6 0 :: 2011-07-13 :: Speed: 689 Kb/s
[TRUSTED DOWNLOAD] server studio r 6 0 :: 2011-07-15 :: Speed: 836 Kb/s
TORRENT.CD DOWNLOAD server studio r 6 0 :: 2010-10-15 :: Speed: 1537 Kb/s

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Site results:

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Crackdb.com results:
Zend Studio Server v5.1.0 LINUX i386 :: 12 Kb :: 3.01.06
Zend Studio Server v5.1.0 LINUX x86-64 :: 12 Kb :: 3.01.06
Zend Studio Server v5.1.0.205 LINUX i386 KeyMaker :: 12 Kb :: 19.02.06
Zend Studio Server v5.1.0.205 LINUX x86-64 KeyMaker :: 12 Kb :: 19.02.06

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SerialNews.com results:
Sorry, no matches... :(