³⁵The “XOFF” code tells the transmitting device to halt its serial data stream to give the receiving device a chance to “catch up.” In data terminal applications, the XOFF command may be issued by pressing the key combination <Ctrl><S>. This will “freeze” the stream of text data sent to the terminal by the host computer. The key combination <Ctrl><Q> sends the “XON” code, enabling the host computer to resume data transmission to the terminal.