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Unicode the capital ?D? is codepoint U+0044 and the lower case ?d? is U+0064.
The ASCII code for capital ?D? is 68 and for lower case ?d? is 100; or in binary 01000100 and 01100100, respectively.
The EBCDIC code for capital ?D? is 196 and for lowercase ?d? is 132.
The numeric character references in HTML and XML are "D" and "d" for upper and lower case, respectively.
In British Sign Language (BSL), the letter ?d? is