Pork and all pork products, shell fish such as crabs, lobsters, oysters, etcetera. Fruits, vegetables, grains, nuts, fish, eggs are neutral or pareve and may be eaten alone or with either meat or dairy foods. Bread and wine have special significance and special laws govern their preparation. Special foods are traditionally served at Jewish Holiday meals and on Shabbat. A number of such recipes are included.
Special laws govern foods that can be served at Passover.
For further reference, see the many books on the subject. Additionally, we suggest that when buying commercially prepared food you check the label for kosher ingredients.