NUL      * All zeros                             VT       * Vertical tabulation                SYN       * Synchronous/idle
 SOH     * Start of heading                   FF       * Form feed                            ETB       * End of transmitted block
 STX      * Start of text                         CR      * Carriage Return                    CAN       * Cancel (error in data)
 ETX      * End of text                          SO      * Shift out                               EM        * End of medium
 EOT     * End of transmission             SI        * Shift in                                 SUB      * Start of special sequence
 ENQ    * Enquiry                               DLE     * Data link escape                   ESC      * Escape
 ACK    * Acknowledgement                DC 1    * Device control 1                    FS        * Information file separator
 BEL     * Bell or attention signal         DC 2    * Device control 2                    GS        * Information group separator
 BS       * Back space                        DC 3    * Device control 3                    RS        * Information record separator
 HT       * Horizontal tabulation            DC 4    * Device control 4                    US        * Information unit separator
 LF       * Line feed                             NAK    * Negative Acknowledgement    DEL      * Delete