Excel 97 (not any other versions)
Incidentally, you can have fun with a bit of software bloat if you have Excel 97. Open a new blank work sheet, press F5,and type X97:L97 in the "Reference" box, then click OK. Tab once. (You should end up in cell M97.) Press Ctrl+Shift while clicking once on the "chart wizard" icon (at the top with the blue-yellow-red bar chart) and you are now in the Excel Flight Simulator mode. Steer with the mouse, use the buttons to zoom in and out, and look for the monolith with the programmer credits. You can exit the screen by pressing Ctrl+Shift+Esc (or hit escape to quit,but then you must restart Excel).