U+0013 "DC3" DEVICE CONTROL THREE Unicode Character

U+0013 "DC3" DEVICE CONTROL THREE is a control character from the C0 control code set originally defined in the ASCII standard. Its primary historical purpose in serial communications, particularly under protocols like XON/XOFF flow control, was to act as an "XOFF" signal, instructing the sending device to pause or stop its data transmission to prevent the receiving device's buffer from overflowing. This character functions as a non-printable command, enabling hardware or software to manage the flow of information over a communication channel.