The X/Open portable character set is a superset of the IBM® invariant character set (00640). The portable character set includes the following 13 symbols that are not represented in the IBM invariant character set 00640:
| GCGID | Description | Graphic character |
|---|---|---|
| SC030000 | Dollar | $ |
| SD110000 | Accent acute |  |
| SD150000 | Caret | ^ |
| SD190000 | Tilde | ~ |
| SM010000 | Number sign | # |
| SM050000 | At sign | @ |
| SM060000 | Left bracket | [ |
| SM070000 | Back slash | \ |
| SM080000 | Right bracket | ] |
| SM110000 | Left brace | { |
| SM130000 | Logical or | | |
| SM140000 | Right brace | } |
| SP020000 | Exclamation point | ! |
The portable character set also includes the space character and control characters representing the horizontal tab, the vertical tab, and form feed.