Kosher is from the Hebrew word kasher, which means "fit" and "proper". The term is usually used for food that Jews are permitted to eat under dietary laws that are derived from passages in the biblical books of Leviticus and Deuteronomy.
Some elements of Jewish and Islamic dietary laws are common, while some are not. Here are some major differences:
It must be noted that if a product is Kosher certified, it does not mean that the product is automatically Halal. While it is true that Kosher certification can be used as a tool for eating halal, one must be very careful. There are Kosher certification agencies which certify products and ingredients which are not considered Kosher by many Jews.