The Test of English as a Foreign Language (TOEFL) is a requirement for applicants whose native language is not English.
There are now two ways the TOEFL can be taken.
TOEFL paper-based (PBT)
TOEFL Internet-based (TOEFL iBT)
Direct from Educational Testing services:
For more information on the Test of English as a Foreign Language (TOEFL), visit http://www.ets.org/toefl/