Data conversion
| -- | ---------- | ------------------ | ---------------------------------- |
| * | CHARCODE | JIS|EUC|SJIS|UTF8 | character conversion for Japanese text |
| * | CHARMAP | [jis|ucs]:a-z/A-Z | map character to character in text data |
| HTMLCONV | deent|enent|pre | decode/encode between HTML & plain text | |
| MIMECONV | thru|charcode | control MIME encoder/decoder |