CRT may refer to: In computing: .crt file extension, in computing The C runtime library (part of the C standard library), in programming The C++ Curiously recurring template pattern, in programming. In education: Criterion-referenced test, a type of exam a Substitute teacher (or casual relief teacher) In electronics: Cathode ray tube, a type of display (or monitor) In law: Charitable remainder trust Contractors Response Time, in service level agreements In medicine: Capillary refill… (More on Crt)