Common employment-based visa categories include the H-1B and H-1B1 for specialty occupations and professionals from Chile or Singapore; the L-1A and L-1B for intracompany transferees such as executives, managers, and specialized-knowledge employees; the E-1, E-2, and E-3 for treaty traders, investors, and Australian professionals; and the O-1, P-1, Q, and TN categories for individuals with extraordinary ability, athletes, entertainers, cultural exchange participants, and NAFTA professionals.