U+2401 "␁" Symbol for Start of Heading Unicode Character

U+2401 "␁" Symbol for Start of Heading is a graphic representation of the control character known as Start of Heading (SOH), which is typically invisible in standard text but used in data transmission protocols to mark the beginning of a message header. This symbol appears as a single uppercase "S" with a bar above it, indicating its role in separating the header from the body of a data stream. It belongs to the Control Pictures block of Unicode, which provides visible glyphs for non printing control characters to assist in debugging, documentation, and telecommunications contexts.