expert — A person who has a comprehensive and authoritative knowledge of or skill in a particular area.
passport — an official document issued by the government of a country to one of its citizens and, varying from country to country, authorizing travel to foreign countries and authenticating the bearer's identity, citizenship, right to protection while abroad, and right to reenter his or her native country.
efficiency expert — a person who studies the methods, procedures, and job characteristics of a business or factory with the object of devising ways to increase the efficiency of equipment and personnel.
