High Quality Content by WIKIPEDIA articles! KDE Software Compilation 4 (KDE SC 4) is the current series of releases of KDE Software Compilation. The first major version (4.0) of this series was released on 11 January 2008, and the latest major version (4.9) was released on 1 August 2012. Major releases (4.x) are scheduled for every six months, while minor bugfix releases (4.x.y) are released monthly.