Rational ClearCase MultiSite (abbreviated to “MultiSite” in this manual) is a layered product option to Rational ClearCase. It supports parallel software development and software reuse across project teams distributed geographically and provides automated, error-free replication of versioned object bases (VOBs). You can also use MultiSite as a VOB interoperation solution in a mixed UNIX and Windows network or as a VOB backup mechanism.