- HTML5
(o)(o)- C
\u0028\u006F\u0029 (C99)\U000028\U00006F\U000029 (C99)\x28\x6F\x29 (encoding-dependent)\050\157\051 (encoding-dependent)- C++
\u{28}\u{6F}\u{29} (C++23)\x{28}\x{6F}\x{29} (C++23, encoding-dependent)\o{050}\o{157}\o{051} (C++23, encoding-dependent)\U00000028\U0000006F\U00000029\u0028\u006F\u0029\x28\x6F\x29 (encoding-dependent)\050\157\051 (encoding-dependent)- Java
\u0028\u006F\u0029- JavaScript
\u{28}\u{6F}\u{29}\u0028\u006F\u0029\x28\x6F\x29- CSS
\28\6F\29\000028\00006F\000029- Quoted-Printable
=28=6F=29- URL
%28%6F%29