The interface
The interface is a so-called consol interface witch means
that you type your commands on the command line at the bottom of the
program and you will see the result in the result field above. In the
result field you will also see a blue arrow and the command you typed
in.
At the far bottom is the status line. Here you can se how much memory
your data variables use and a meter. The meter is used to see how much
of a calculation that has been done. Most calculations are done so fast
that the meter doesn't react before the calculations are finished.