| 11. | It is an old way to display an alphanumeric character.
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| 12. | The following list is largely limited to non-alphanumeric characters.
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| 13. | Classes and IDs are case-sensitive, start with letters, and can include alphanumeric characters and underscores.
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| 14. | Each " deck " of cards could contain up to 5.5 MB of alphanumeric characters.
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| 15. | USSD messages are up to 182 alphanumeric characters long.
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| 16. | Does Cluebot pick up instantly on every accidental mistyping of non-alphanumeric characters as potential vandalism?
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| 17. | Traditionally, filenames allowed only alphanumeric characters, but as time progressed, the number of characters allowed increased.
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| 18. | The BBAN must be of a fixed length for the country and comprise case-insensitive alphanumeric characters.
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| 19. | Normally searches ignore non-alphanumeric characters, but regular expressions ( regex ) accept all characters, plus metacharacters.
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| 20. | Some sites also block non-ASCII or non-alphanumeric characters.
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