ISO 2047
ISO 2047 (Information processing – Graphical representations for the control characters of the 7-bit coded character set) is a standard for graphical representation of the control characters for debugging purposes, such as may be found in the character generator of a computer terminal; it also establishes a two-letter abbreviation of each control character. The graphics and two-letter codes are essentially unchanged from the 1968 European standard ECMA-17 and the 1973 American standard ANSI X3.32-1973. It became an ISO standard in 1975. It is also standardized as GB/T 3911-1983 in China, as KS X 1010 in Korea (formerly KS C 5713), and was enacted in Japan as "graphical representation of information exchange capabilities for character" JIS X 0209:1976 (former JIS C 6227) (abolished January 20, 2010).
While the ISO/IEC 646 three-letter abbreviations (such as "ESC"), or caret notation (such as "^[") are still in use, the graphical symbols of ISO 2047 are considered outdated and rare.
Character table
Code (hex) |
Common abbreviation |
Name | Symbol | 2-letter abbreviation | |
---|---|---|---|---|---|
00 | NUL | Null | ⎕ | U+2395 | NU |
01 | TC1, SOH | Start of Heading | ⌈ | U+2308 | SH |
02 | TC2, STX | Start of Text | ⊥ | U+22A5 | SX |
03 | TC3, ETX | End of Text | ⌋ | U+230B | EX |
04 | TC4, EOT | End of Transmission | ⌁ | U+2301 | ET |
05 | TC5, ENQ | Enquiry | ⊠ | U+22A0 | EQ |
06 | TC6, ACK | Acknowledge | ✓ | U+2713 | AK |
07 | BEL | Bell | ⍾ | U+237E | BL |
08 | FE0, BS | Backspace | ⤺ | — | BS |
09 | FE1, HT | Horizontal Tabulation | ⪫ | U+2AAB | HT |
0A | FE2, LF | Line Feed | ≡ | U+2261 | LF |
0B | FE3, VT | Vertical Tabulation | ⩛ | U+2A5B | VT |
0C | FE4, FF | Form Feed | ↡ | U+21A1 | FF |
0D | FE5, CR | Carriage Return | ⪪ | U+2AAA | CR |
0E | SO | Shift Out | ⊗ | U+2297 | SO |
0F | SI | Shift In | ⊙ | U+2299 | SI |
10 | TC7, DLE | Data Link Escape | ⊟ | U+229F | DL |
11 | DC1, XON, CON | Device Control 1 | ◷ | U+25F7 | D1 |
12 | DC2, RPT, TAPE | Device Control 2 | ◶ | U+25F6 | D2 |
13 | DC3, XOF, XOFF | Device Control 3 | ◵ | U+25F5 | D3 |
14 | DC4, COF, KMC, |
Device Control 4 | ◴ | U+25F4 | D4 |
15 | TC8, NAK | Negative Acknowledge | ⍻ | U+237B | NK |
16 | TC9, SYN | Synchronization | ⎍ | U+238D | SY |
17 | TC10, ETB | End of Transmission Block | ⊣ | U+22A3 | EB |
18 | CAN | Cancel | ⧖ | U+29D6 | CN |
19 | EM | End of Medium | ⍿ | U+237F | EM |
1A | SUB | Substitute Character | ␦ | U+2426 | SB |
1B | ESC | Escape | ⊖ | U+2296 | EC |
1C | IS4, FS | File Separator | ◰ | U+25F0 | FS |
1D | IS3, GS | Group Separator | ◱ | U+25F1 | GS |
1E | IS2, RS | Record Separator | ◲ | U+25F2 | RS |
1F | IS1 US | Unit Separator | ◳ | U+25F3 | US |
20 | SP | Space | △ | U+25B3 | SP |
7F | DEL | Delete | — | DT |