What is 7-grain cereal?

The foloowing are the ingredienst in some of the 7-grain cereal:

http://www.bobsredmill.com/7-grain-hot-cereal.html

7-Grain Cereal is milled and blended from freshly ground high
protein, whole grain wheat, rye, oats, triticale, barley, brown rice, oat bran
and flaxseed.

===================================================

http://www.grainworks.com/index.php?id=28

7-grain cereal consists of wheat, triticale, rye, barley, oats, millet and flax.

===================================================

http://www.paulsgrains.com/cereals.htm

7-Grain Cereal
This item has remained one of our bestsellers for many years. Using our unique recipe, we mix up a delicious blend of wheat, rye, oats, barley, corn, buckwheat, and flax. 


======================================

https://www.usaemergencysupply.com/food_storage/cereal_seven_grain_mix.htm

Seven Grain Cereal Mix

Our 7 Grain Mix contains Golden 86 wheat, oat groats, pearl barley, brown rice, triticale, rye and millet. Packed in it's whole grain form, our 7 grain mix is a good storing food if properly packed and stored in a cool place. Grinding this mix makes a hearty flour that makes a flavorful, nutritious loaf of bread. Boiling it whole for about an hour makes a nutty breakfast cereal we think you'll really like.