The DS-160, Nonimmigrant Visa Electronic Application, is a fully integrated online application form used to collect the necessary application information from persons seeking a nonimmigrant visa. It replaced prior nonimmigrant application forms DS-156, 157, 158, and other related forms, such as the DS-156E, 156K, and 156V.

See: Online Nonimmigrant Visa Application DS-160 EXEMPLAR from DOS

Also see: the final rule establishing authority for the DS-160.