Glucose Tolerance Test (GTT). GTT is an abbreviation for Glucose Tolerance Test, which is a measure of the amount of glucose present in the blood stream of a person at the time the test is taken. This test is usually done to check for glucose related problems like hyperglycemia or hypoglycemia in the patient.
Contemporary R&B, also known as simply R&B, is a music genre that combines elements of rhythm and blues, soul, funk, pop, hip hop and dance.
It used to be that the A&R's role was to spend their evenings in smoke-filled clubs discovering bands, and helping them to develop before releasing their first record (the Wikipedia entry says: Artists and repertoire (A&R) is the division of a record label that is responsible for talent scouting and overseeing the artistic development of recording artists).