The term BETA can refer to a variety of things. TRON is a 1982 science fiction film, PHI is the 21st letter of the Greek alphabet, TEST is an assessment used to measure knowledge or skills, KAPPA is the 10th letter of the Greek alphabet, ALPHA is the first letter of the Greek alphabet, USER is someone who uses a computer or program, CAROTENE is a type of pigment found in plants, and GAMMA is the third letter of the Greek alphabet.