Complex sentence: World Wind is an open-source (released under the NOSA license) virtual globe first developed by NASA in 2003 for use on personal computers and then further developed in concert with the open source community since 2004.
Split into simpler sentences: World Wind is an open-source (released under the NOSA license) virtual globe. It was first developed by NASA in 2003 for use on personal computers and then further developed in concert with the open source community since 2004.