IELTS stands for International English Language Testing System.

The TOEFL iBT standardized test is the most widely accepted and recognized English-language test in the world

GRE stands for Graduate Record Examinations. It is a standardized aptitude exam that comes with a pre-defined syllabus.

PTE stands for Pearson Test for English.

GMAT stands for Graduate Management Admission Test.

OET stands for Online Entrance Tests.