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Closed Source                                          Open Source



                          System                                              System









                 more security threats                              better security  with great

                    due to widespread                                    community support

                              used













                      user code kept                                          user code is
                             secret                                        freely-distributed














                                                                         requires extensive
                         easy to use                                            knowledge
















                requires a paid license                                       free to use















                              e.g :                                                  e.g :

                   Microsoft Windows                                                Linux



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