KanjiEUC uses the four external code sets defined in the following table.
| Code Set | Description | Note |
|---|---|---|
| 0 | Single-byte character data Not permitted for the GRAPHIC server character set |
JIS X 0201 For the detailed encoding, see Shift-JIS Encoding: Detailed View. |
| 1 | Two-byte character data | JIS X 0208 |
| 2 | Two-byte multibyte character with first byte ss 2=0x8E Not permitted for the GRAPHIC server character set |
JIS X 0201 Hankaku Katakana |
| 3 | Three-byte multibyte character with first byte ss 3=0x8F | JIS X 0212 |