You may need to click Type
Key and then press Backspace
to activate the keyboard.
Then type:
c:
dir
cd physics
\tp\turbo
Press F3 and Enter, and
a list of files is shown.
To try simulated galaxy collision open SGG.PAS by moving to it with the
arrow keys and press Enter.
Press Alt+R followed
by R to run
the program.
Test with the following SGG-data and press Enter after each line: