| Name | BOPOMOFO LETTER ONN |
| Unicode Version | 3.0 |
| Block（ブロック） | Bopomofo Extended（注音字母拡張） |
| Plane（面） | Basic Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | ㆧ ㆧ |
| UTF-8 Encoding | ㆧ e386a7 |
| UTF-16 Encoding | ㆧ 31a7 |
| UTF-32 Encoding | ㆧ 000031a7 |