There's corn in almost everything - most store bought breads, most store bought pasta sauces and salsas, most condiments, most prepared foods of any kind. There's probably corn in one form or another in your biscuits and gravy as well, Rapaire, if you make them from mixes, or buy them already made. There's corn in most kinds of canned tomatoes and also jams and jellies in the form of citric acid. There's even corn in iodized table salt (in the form of dextrose).

If you want to find out how ubiquitous corn is, print out the list of food additives in the link bobad provided in his 01 Dec 07 - 08:41 AM post, take it to the grocery store with you the next time you go (or even just in your own pantry), and compare the ingredients in the food you encounter with the items on the list.