This program plots conics in standard form, as well as quadratic curves.
The constants that usually occur in these formula, viz. a, b, c, d, e, f, h,
k, and r, can be changed at will and the curves redrawn.

   When you have finished reading this document, you will be presented with a
choice of options.  You can use the right-arrow and left-arrow keys to
highlight your choice.  These keys are on the right hand side of the
keyboard. When your choice is highlighted, select it by pressing the RETURN
or ENTER key.

   You can always get HELP by pressing the F1 key, usually located on the
left hand side of the keyboard.  When you have finished with help, press the
ESCape key.  Why not get HELP now, by pressing F1?

   You can always re-read these instructions later by going to the OTHER menu
and selecting INSTRUCTIONS.

                       Press the ESCape key, when finished.