K Desktop Environment 2
K Desktop Environment 2.2.2
|Initial release||23 October 2000|
|Stable release||2.2.2 / November 21, 2001|
|Written in||C++ (Qt 2)|
|Operating system||Unix-like with X11|
K Desktop Environment 2 was the second series of releases of the K Desktop Environment (now called KDE Software Compilation). There were three major releases in this series.
Major updates 
K Desktop Environment 2 introduced significant technological improvements compared to its predecessor.
KIO, an application I/O library. It is network transparent and can access HTTP, FTP, POP, IMAP, NFS, SMB, LDAP and local files. Moreover, its design permits developers to "drop in" additional protocols, such as WebDAV, which will then automatically be available to all KDE applications. KIO can also locate handlers for specified MIME types; these handlers can then be embedded within the requesting application using the KParts technology.
KParts, a component object model, allows an application to embed another within itself. The technology handles all aspects of the embedding, such as positioning toolbars and inserting the proper menus when the embedded component is activated or deactivated. KParts can also interface with the KIO trader to locate available handlers for specific MIME types or services/protocols.
K Desktop Environment 2.0 
K Desktop Environment 2 also shipped with the initial release of the KOffice suite, consisting of a spreadsheet application (KSpread), a vector drawing application (KIllustrator), a frame-based word-processing application (KWord), a presentation program (KPresenter), and a chart and diagram application (KChart). Native file formats were XML-based. KOffice included a scripting language and the ability to embed individual components within each other using KParts.
K Desktop Environment 2.1 
K Desktop Environment 2.2 
Release schedule 
|23 October 2000||KDE 2.0 released|
|5 December 2000||2.0.1 Maintenance release.|
|26 February 2001||KDE 2.1 released|
|27 March 2001||2.1.1 Maintenance release.|
|30 April 2001||2.1.2 Maintenance release (kdelibs only).|
|15 August 2001||KDE 2.2 released|
|19 September 2001||2.2.1 Maintenance release.|
|21 November 2001||2.2.2 Maintenance release.|