The Basic 4 Food Groups of the 1950s were replaced by the early 1990s Food Pyramid to better reflect a healthier mix of foods for US diets.

Some populations of the world have their own food pyramids, reflecting their preferred dietary choices. See the links below for more specifics.

 Other Food Pyramids

Several cultural pyramids:
http://www.nal.usda.gov/fnic/etext/000023.html#xtocid2381818
Interactive guide to daily food choices:
http://www.nal.usda.gov:8001/py/pmap.htm
Food and Nutrition Information Center [includes food composition info, dietary guidelines, info on dietary supplements, etc]:
http://www.nal.usda.gov/fnic/Fpyr/pyramid.html source of picture above
Several condition-specific pyramids:
http://www.kde.state.ky.us/odss/nutrition/pyramid/pyramid.htm
What is the Food Guide Pyramid? Find out here:
http://www.pueblo.gsa.gov/cic_text/food/food-pyramid/main.htm
An easy way to eat right--each group on pyramid is discussed:
http://www.ganesa.com/food/index.html