I am trying to save space on my laptop because I only created a 3GB partition for linux.

In the Add/Remove Applications I only have X Window System fully selected as my Desktops (Environment). GNOME, KDE, XFCE are fully un-checked.

I am developing a QT application, so I have installed:

- Development Tools (65), full
- X Software Development (11), half, due to dependencies
- GNOME Software Development (21), half, due to dependencies
- KDE (20), full, for QT

Now the strange thing is that I can boot into both KDE and GNOME. However I don't recall installing them during my Linux distro installation. Plus I unchecked them. Now, Add/Remove Applications claim they are not installed from the (0) number of sub-packages installed counter/status. Is it true that KDE gets implicitly installed due to the KDE Development Tools being installed?

If you install the development tools then it will install a minimum destop so that you can use it. This a dependency issue (ITS NEEDED).