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H\ZRUGVRSHQVWDQGDUGVRSHQVRXUFHVRIWZDUHOLFHQVHEXVLQHVVVWUDWHJ\ 3DJH RI Acknowledgement , ZRXOG OLNH WR H[SUHVV P\ JUDWLWXGH WRZDUGV P\ DGYLVRU $QGHUV +HGHUVWLHUQD IRU JLYLQJ PH FRQVWUXFWLYHFULWLFLVPDVVLVWLQJPHWRUHDFKWKHJRDORIWKLVUHSRUW Abbreviations $3,± $SSOLFDWLRQ3URJUDPPLQJ,QWHUIDFH &$± &DOLIRUQLD &96± &RQFXUUHQW9HUVLRQLQJ6\VWHP '16± 'RPDLQ1DPH6HUYHU /*3/± /LEUDU\*HQHUDO3XEOLF/LFHQVH *3/± *HQHUDO3XEOLF/LFHQVH 0,7± 0DVVDFKXVHWWV,QVWLWXWHRI7HFKQRORJ\ 26%0± 2SHQ6RXUFH%XVLQHVV0RGHOV 26,± 2SHQ6RXUFH,QLWLDWLYH 266± 2SHQ6RXUFH6RIWZDUH 3*3± 3UHWW\*RRG3ULYDF\ 63,± 6RIWZDUHLQWKH3XEOLF,QWHUHVW 3DJH RI INTRODUCTION _ 1.1 Background 1.2 Aim of the Thesis 1.3 Research Question _ 1.4 Method 1.5 Limitations _ THEORETICAL STUDIES OF OPEN SOURCE SOFTWARE _ 10 2.1 Introduction _ 10 2.2  Open Source Software 12  7KHOLFHQVLQJPRGHO BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB   'LIIHUHQWFDWHJRULHVRIVRIWZDUHBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  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BBBBBBBBBBBBBBBBBBB  The Commercialisation of Open Source Software 21 5HYHQXH6WUHDPVLQWKH2SHQ6RXUFH6RIWZDUH0RGHO BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  CASE STUDIES OF OPEN SOURCE SOFTWARE COMPANIES _ 22 3.1  Open source software companies and their products _ 22  ± *18/LQX[BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB       6HQGPDLO BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  ± 3HUO BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  ± $SDFKH+7736HUYHU BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  ± 1HWVFDSH1DYLJDWRU0R]LOODBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  0\64/'DWDEDVH0DQDJHPHQW6\VWHPBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB  ANALYSES OF THE CASE STUDIES COMPARED TO THE THEORY 34 4.1 Case studies _ 34 3DJH RI  $QDO\VHRI6HQGPDLO,QFDQGWKH6HQGPDLOSURGXFWBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB   $QDO\VHRI5HG+DWDQGWKH/LQX[SURGXFWBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB       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