Mastercook is a recipe program that a lot of people posting to cookery-themed internet groups & boards seem to use.
The formatting in the recipe (the M's etc) tell the program what fields to look for when importing text recipes.
A lot of other recipe file / cookbook programs (such as
Homecook which I use) can now import / export from Mastercook format, seeing as it seems to be the most widely used format in cooking programs today.
It's good, cos even if you don't use a recipe book application, you can still read the recipe file and use it. I downloaded the free trial of homecook and loved it so much I paid the purchase price after a week.
BTW: I currently have a database of 182,459 recipes. I can export this and email it to anyone who wants it.
Also, I LOVE wild rice (and love that my pressure cooker does it so quickly)