| Character set | Code | Symbol | Name |
|---|---|---|---|
| Code page 437 | 251 | √ | Square root |
| ISO-8859-1 | 251 | û | Latin small letter u with circumflex |
| ISO-8859-2 | 251 | ű | Latin small letter u with double acute |
| ISO-8859-3 | 251 | û | Latin small letter u with circumflex |
| ISO-8859-4 | 251 | û | Latin small letter u with circumflex |
| ISO-8859-5 | 251 | ћ | Cyrillic small letter Tshe |
| ISO-8859-6 | 251 | Unused | |
| ISO-8859-7 | 251 | ϋ | Greek small letter upsilon with dialytika |
| ISO-8859-8 | 251 | Unused | |
| ISO-8859-9 | 251 | û | Latin small letter u with circumflex |
| ISO-8859-10 | 251 | û | Latin small letter u with circumflex |
| ISO-8859-11 | 251 | ๛ | Thai character Khomut |
| Windows-1250 | 251 | ű | Latin small letter u with double acute |
| Windows-1251 | 251 | ы | Cyrillic small letter yeru |
| Windows-1252 | 251 | û | Latin small letter u with circumflex |
| Windows-1253 | 251 | ϋ | Greek small letter upsilon with dialytika |
| Windows-1254 | 251 | û | Latin small letter u with circumflex |
| Windows-1255 | 251 | Unused | |
| Windows-1256 | 251 | û | Latin small letter u with circumflex |
| Windows-1257 | 251 | ū | Latin small letter u with macron |
| Windows-1258 | 251 | û | Latin small letter u with circumflex |