| Value | Code | Description |
| Position | Decimal | Octal | Hexadecimal |
| 00/00 | 0 | 000 | $00 | NUL | Null |
| 00/01 | 1 | 001 | $01 | TC1 | Transmission Control character 1 |
| SOH | Start Of Heading |
| 00/02 | 2 | 002 | $02 | TC2 | Transmission Control character 2 |
| STX | Start of TeXt |
| 00/03 | 3 | 003 | $03 | TC3 | Transmission Control character 3 |
| ETX | End of TeXt |
| 00/04 | 4 | 004 | $04 | TC4 | Transmission Control character 4 |
| EOT | End Of Tranmission |
| 00/05 | 5 | 005 | $05 | TC5 | Transmission Control character 5 |
| ENQ | ENQuiry |
| 00/06 | 6 | 006 | $06 | TC6 | Transmission Control character 6 |
| ACK | ACKnowledge |
| 00/07 | 7 | 007 | $07 | BEL | Bell |
| 00/08 | 8 | 010 | $08 | FE0 | Format Effector 0 |
| BS | Back Space |
| 00/09 | 9 | 011 | $09 | FE1 | Format Effector 1 |
| HT | Horizontal Tab |
| 00/10 | 10 | 012 | $0A | FE2 | Format Effector 2 |
| LF | Line Feed |
| 00/11 | 11 | 013 | $0B | FE3 | Format Effector 3 |
| VT | Vertical Tab |
| 00/12 | 12 | 014 | $0C | FE4 | Format Effector 4 |
| FF | Form Feed |
| 00/13 | 13 | 015 | $0D | FE5 | Format Effector 5 |
| CR | Carriage Return |
| 00/14 | 14 | 016 | $0E | SO | Shift Out (7-bit environment) |
| 00/14 | 14 | 016 | $0E | LS1 | Locking Shift 1 (8-bit environment |
| 00/15 | 15 | 017 | $0F | SI | Shift In (7-bit environment |
| 00/15 | 15 | 017 | $0F | LS0 | Locking Shift 0 (8-bit environment |
| 01/00 | 16 | 020 | $10 | TC7 | Transmission Control character 7 |
| DLE | Data Link Escape |
| 01/01 | 17 | 021 | $11 | DC1 | Device Control 1 |
| 01/02 | 18 | 022 | $12 | DC2 | Device Control 2 |
| 01/03 | 19 | 023 | $13 | DC3 | Device Control 3 |
| 01/04 | 20 | 024 | $14 | DC4 | Device Control 4 |
| 01/05 | 21 | 025 | $15 | TC8 | Transmission Control character 8 |
| NAK | Negative AcKnowledgement |
| 01/06 | 22 | 026 | $16 | TC9 | Transmission Control character 9 |
| SYN | SYNchronous idle |
| 01/07 | 23 | 027 | $17 | TC10 | Transmission Control character 10 |
| ETB | End of Transmission Block |
| 01/08 | 24 | 030 | $18 | CAN | CANcel |
| 01/09 | 25 | 031 | $19 | EM | End of Medium |
| 01/10 | 26 | 032 | $1A | SUB | SUBstitute character |
| 01/11 | 27 | 033 | $1B | ESC | ESCape |
| 01/12 | 28 | 034 | $1C | IS4 | Information Separator 4 |
| FS | File Separator |
| 01/13 | 29 | 035 | $1D | IS3 | Information Separator 3 |
| GS | Group Separator |
| 01/14 | 30 | 036 | $1E | IS2 | Information Separator 2 |
| RS | Record Separator |
| 01/15 | 31 | 037 | $1F | IS1 | Information Separator 1 |
| US | Unit Separator |
| Value | 7 bit sequence | Code | Description |
| Position | Decimal | Octal | Hexadecimal |
| 08/00 | 128 | 200 | $80 | ESC @ | PAD | PADding character (only in DIS 10646) |
| 08/01 | 129 | 201 | $81 | ESC A | HOP | High Octet Preset (only in DIS 10646) |
| 08/02 | 130 | 202 | $82 | ESC B | BPH | Break Permitted Here (not in ISO-IR 77) |
| 08/03 | 131 | 203 | $83 | ESC C | NBH | No Break Here (not in ISO-IR 77) |
| 08/04 | 132 | 204 | $84 | ESC D | IND | INDex (not in ISO/IEC 6429:1992) |
| 08/05 | 133 | 205 | $85 | ESC E | NEL | NExt Line |
| 08/06 | 134 | 206 | $86 | ESC F | SSA | Start of Selected Area |
| 08/07 | 135 | 207 | $87 | ESC G | ESA | End of Selected Area |
| 08/08 | 136 | 210 | $88 | ESC H | HTS | Horizontal Tabualtion Set |
| 08/09 | 137 | 211 | $89 | ESC I | HTJ | Horizontal Tabulation with Justification |
| 08/10 | 138 | 212 | $8A | ESC J | VTS | Vertical Tabulation Set |
| 08/11 | 139 | 213 | $8B | ESC K | PLD | Partial Line Down |
| 08/12 | 140 | 214 | $8C | ESC L | PLU | Partial Line Up |
| 08/13 | 141 | 215 | $8D | ESC M | RI | Reverse Index |
| 08/14 | 142 | 216 | $8E | ESC N | SS2 | Single Shift 2 |
| 08/15 | 143 | 217 | $8F | ESC O | SS3 | Single Shift 3 |
| 09/00 | 144 | 220 | $90 | ESC P | DCS | Device Control String |
| 09/01 | 145 | 221 | $91 | ESC Q | PU1 | Private Use 1 |
| 09/02 | 146 | 222 | $92 | ESC R | PU2 | Private Use 2 |
| 09/03 | 147 | 223 | $93 | ESC S | STS | Set Transmit State |
| 09/04 | 148 | 224 | $94 | ESC T | CCH | Cancel CHaracter |
| 09/05 | 149 | 225 | $95 | ESC U | MW | Message Waiting |
| 09/06 | 150 | 226 | $96 | ESC V | SPA | Start of guarded Protected Area |
| 09/07 | 151 | 227 | $97 | ESC W | EPA | End of guarded Protected Area |
| 09/08 | 152 | 230 | $98 | ESC X | SOS | Start Of String (not in ISO-IR 77) |
| 09/09 | 153 | 231 | $99 | ESC Y | SGCI | Single Graphic Character Introducer (only in DIS 10646) |
| 09/10 | 154 | 232 | $9A | ESC Z | SCI | Single Character Introducer (not in ISO-IR 77) |
| 09/11 | 155 | 233 | $9B | ESC [ | CSI | Control Sequence Introducer |
| 09/12 | 156 | 234 | $9C | ESC \ | ST | String Terminator |
| 09/13 | 157 | 235 | $9D | ESC ] | OSC | Operating System Command |
| 09/14 | 158 | 236 | $9E | ESC ^ | PM | Privacy Message |
| 09/15 | 159 | 237 | $9F | ESC _ | APC | Application Program Command |