U+009F "APC" APPLICATION PROGRAM COMMAND Unicode Character

U+009F "APC" APPLICATION PROGRAM COMMAND is a control character from the C1 control code set, intended for use in data streams to signal the beginning of a command or instruction to be processed by an application or terminal program, rather than being rendered as a visible glyph. It is part of a series of C1 controls defined in ISO/IEC 6429, and while historically utilized in contexts like teletext or terminal communication, its usage is now largely obsolete in modern text encoding environments. In practice, it is rarely encountered in plain text and is often treated as a non printable character by contemporary software and parsers.