KDE () is an international free software community that develops Free and Libre software. Well-known products include the Plasma Desktop, KDE Frameworks and a range of cross-platform applications designed to run on modern Unix-like and Microsoft Windows systems. It further provides tools and documentation for developers that enables them to write software. This supporting role makes KDE a central development hub and home for many popular applications and projects like Calligra Suite, Krita or digiKam. 

The Plasma Desktop, being one of the most recognized projects of KDE, is the default desktop environment on many Linux distributions, such as openSUSE, Mageia, Chakra, Kubuntu, Manjaro Linux, and PCLinuxOS. It was also the default desktop environment on PC-BSD, but was later replaced with Lumina, a desktop environment which, like KDE, is written in C++ and Qt. 

The work of the KDE community can be measured in the following figures: 

K Desktop Environment (KDE) was founded in 1996 by Matthias Ettrich, who was then a student at the Eberhard Karls University of Tübingen. At the time, he was troubled by certain aspects of the Unix desktop. Among his concerns was that none of the applications looked, felt, or worked alike. He proposed the creation of not merely a set of applications but a desktop environment in which users could expect things to look, feel, and work consistently. He also wanted to make this desktop easy to use; one of his complaints about desktop applications of the time was that it is too complicated for end user. His initial Usenet post spurred a lot of interest, and the KDE project was born.
What is KDE?
What is one well known product?
what else?
Which one was more popular?
What that a default desktop environment?
Was it mainly on Linux or Windows?
Name one of those Linux distributions?
What about another one?
What does KDE stand for?
when was it founded?
By who?
What he a student or a professor?
At what university?
What was he troubled by?
Did he want something more than a desktop environment?
what was his issue about desktops?
Were people interested in what he created?
Was it a lot or a little interest.
Do people pay for the software or is it free?
Can it run on Microsoft systems?
an international free software community
an international free software community
Plasma Desktop,
Plasma Desktop,
KDE Frameworks
 KDE Frameworks
The Plasma Desktop
The Plasma Desktop
Yes
is the default desktop environment 
Linux
Linux
openSUSE
openSUSE
Mageia
Mageia
K Desktop Environment
K Desktop Environment (KDE)
1996
1996 
Matthias Ettrich
Matthias Ettrich
a student
a student
Eberhard Karls University
 Eberhard Karls University
certain aspects of the Unix desktop
certain aspects of the Unix desktop
Yes
 but a desktop environment in which users could expect things to look, feel, and work consistently.
that none of the applications looked, felt, or worked alike.
that none of the applications looked, felt, or worked alike.
Yes!
a lot of interest,
a lot
 a lot 
Free
Free
Yes
Microsoft Windows