This section summarizes the changes between VirtualBox versions. Note that this change log is not exhaustive; not all changes are listed. VirtualBox version numbers consist of three numbers separated by dots where the first and second number represent the major version and the 3rd number the minor version. Minor version numbers of official releases are always even. An odd minor version number represents an internal development or test build. In addition, each build contains a revision number. With VirtualBox 5.0, changelog information for versions before 4.3 was removed in order to save space. To access this information, please consult the User Manual of VirtualBox version 4.3 or earlier.