The Test of English as a Foreign Language (TOEFL) have two types: the Internet-based exam (iBT) and paper-based exam (PBT). The reading subtest for the iBT exam and the PBT exam varies. In the iBT exam, passages are lifted from academic sources. Whereas in the PBT exam, examinees are required to read non-academic materials. Keep in mind that the PBT test is only administered to countries where the Internet is inaccessible, but in general, candidates take the iBT exam.