The document contains questions about user interfaces and tasks involving connecting programs to user interface types and desktop environments to operating systems. It asks what user interfaces allow users to do, lists common interface types like CLI and GUI, and asks if console is a GUI. It then has tasks of connecting programs like Firefox and Word to either CLI or GUI and connecting desktop environments like GNOME and KDE to operating systems like Windows and Linux.

1. Questions
1. What does user interface allow to do?
2. What types of UI do you know?
3. Console is a GUI, isn’t it?
4. How does user interact with programs in CLI and GUI?
Tasks
1. Put arrows between programs and types of UI, which they use.
FAR Manager
Norton Commander
GIMP
Mozilla Firefox
Vim
Microsoft Office Word
gcc
mc
MATLAB
Altium Designer
Total Commander
Emacs
apt-get
2. Put arrows between desktop environments and OS, there they is used.
GNOME Microsoft Windows
Aqua
KDE
LXDE Mac OS X
Luna
Aero
Xfce UNIX