U+009B "CSI" CONTROL SEQUENCE INTRODUCER Unicode Character

U+009B "CSI" CONTROL SEQUENCE INTRODUCER is a control character in the C1 control code set, used primarily in terminal and text display protocols to initiate a sequence of commands that control cursor movement, text formatting, and other display attributes. It serves as the opening marker for ANSI escape sequences, allowing programs to send instructions like moving the cursor to a specific position or changing text color, and it is typically followed by parameter bytes and a final command letter.