The Who's Who of Unicode charsets
| Charset | Length per Char | Allowed Chars | Used for… |
|---|---|---|---|
| ASCII | 1 | U+0000007F | Nostalgia |
| UTF-8 | 1/2/3/4 | U+0010FFFF | Storage and Communication in most modern OS |
| UCS-2 | 2 | U+0000FFFF | Internal Storage in Windows NT |
| UTF-16 | 2/4 | U+0010FFFF | Internal Storage in Windows/Python |
| UTF-32/UCS-4 | 4 | U+7FFFFFFF | Internal Storage in Plan 9 |