Moral system is a set of beliefs and values that guide an individual or group in making decisions. It is often referred to as ETHICS, which is derived from the Greek word 'ETHOS' meaning character. ETHIC is a branch of philosophy that deals with morality and the principles of right and wrong behavior. ETHICS is the study of moral principles and their application in society. Both ETHIC and ETHICS are used to refer to the same concept, but ETHIC is more commonly used to refer to the individual's moral code, while ETHICS is more commonly used to refer to the collective moral code of a society.