The B-1 visa is designed for short-term business activities such as attending meetings, negotiating contracts, or participating in professional events. The B-2 visa, on the other hand, is intended for leisure purposes including tourism, visiting family or friends, receiving medical treatment, or attending non-degree recreational courses. In practice, most applicants are issued a combined B-1/B-2 visa, which allows both business and tourism travel under one visa. Neither visa permits full-time study or employment. The permitted length of stay is usually up to six months, determined by U.S. Customs and Border Protection officers at the port of entry.