K Desktop Environment 2
K Desktop Environment 2.2.2
Developer	KDE
Initial release	23 October 2000; 25 years ago (2000-10-23)
Final release	2.2.2 / 21 November 2001; 24 years ago (2001-11-21)
Written in	C++ (Qt 2)
Operating system	Unix-like withX11
Predecessor	K Desktop Environment 1
Successor	K Desktop Environment 3
Type	Desktop environment
Website	kde.org

K Desktop Environment 2 was the second series of releases of theK Desktop Environment. There were three major releases in this series.

K Desktop Environment 2 introduced significant technological improvements compared to its predecessor.^[1]

DCOP (Desktop COmmunication Protocol), a client-to-client communications protocol intermediated by a server over the standardX11 ICE library.^[1]

KIO, an applicationI/O library. It is network transparent and can accessHTTP,FTP,PoP,IMAP,NFS,SMB,LDAP and local files. Moreover, its design permits developers to "drop in" additional protocols, such asWebDAV, which will then automatically be available to all KDE applications. KIO can also locate handlers for specifiedMIME types; these handlers can then be embedded within the requesting application using the KParts technology.^[1]

KParts, acomponent 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.^[1]

KHTML, anHTML 4.0 compliant rendering and drawing engine. It supports many Internet technologies, includingJavaScript,Java, HTML 4.0,CSS 2, andSSL for secure communications. It is compatible with Netscape plugins such asFlash. KHTML also has the capacity to embed components within itself using the KParts technology.^[1]

Konqueror was introduced as web browser, file manager and document viewer.^[2] It usedKHTML for displaying web pages.^[1]

K Desktop Environment 2 also shipped with the initial release of theKOffice 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 wereXML-based. KOffice included a scripting language and the ability to embed individual components within each other using KParts.^[1]

The K Desktop Environment 2.1 release inaugurated the media playernoatun, which used a modular, plugin design. For development, K Desktop Environment 2.1 was bundled withKDevelop.^[3]

The KDE 2.2 release featured up to a 50% improvement in application startup time on Linux systems and increased stability and capabilities for HTML rendering and JavaScript. A number of new plugins were included in Konqueror.KMail received the addition of IMAP support (including SSL and TLS), whileKOrganizer got nativeiCalendar support. Other improvements included a new plugin-based print architecture and a personalization wizard.^[4]

After celebrating KDE’s 20th birthday with a re-release of K Desktop Environment 1.1.2 on 14 October 2016,^[5] KDE andFedora contributor Helio Chissini de Castro also did re-releases of Qt2 in October 2017^[6] and KDELibs 2.2.2 in December 2017.^[7][8]

• 2000 software
• Desktop environments
• KDE Software Compilation

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