- HTML5
13.13.- C
\u0031\u0033\u002E (C99)\U000031\U000033\U00002E (C99)\x31\x33\x2E (encoding-dependent)\061\063\056 (encoding-dependent)- C++
\u{31}\u{33}\u{2E} (C++23)\x{31}\x{33}\x{2E} (C++23, encoding-dependent)\o{061}\o{063}\o{056} (C++23, encoding-dependent)\U00000031\U00000033\U0000002E\u0031\u0033\u002E\x31\x33\x2E (encoding-dependent)\061\063\056 (encoding-dependent)- Java
\u0031\u0033\u002E- JavaScript
\u{31}\u{33}\u{2E}\u0031\u0033\u002E\x31\x33\x2E- CSS
\31\33\2E\000031\000033\00002E- Quoted-Printable
=31=33=2E- URL
%31%33%2E