What does REGIST stand for?

Register

A grille equipped with an integral damper or control valve. A device designed to open if it detects excess temperature or pressure. A grill placed over a heating duct or cold air return. A group of flip-flops capable of storing data. A part of internal storage having a specified storage capacity and usually intended for a specific purpose. A set of bits of high-speed memory within a microprocessor or other electronic device, used to hold data for a particular purpose.