U+0001 "SOH" START OF HEADING Unicode Character

U+0001 "SOH" START OF HEADING is a control character originally defined in ASCII and later adopted into Unicode, designed to precede and indicate the start of a header block in a data transmission stream. Historically used in telecommunications and early computer protocols, SOH helps structure data by signaling to a receiver that the following bytes contain metadata, such as addressing or routing information, before the main message body begins. Although not visible in typical text output, it remains a fundamental part of legacy serial communication standards and specific modern data formats requiring discrete control sequences.