www.w3.org/MarkUp/HTMLPlus/htmlplus_13.html

&amp;: ampersand &; &lt;: less than sign <; &gt;: greater than sign >; &quot;: the double quote sign ". Appendix II lists a broad range of characters and symbols, ...

www.w3.org/MarkUp/html3/latin1.html

Only the entities listed below are supported. Name Syntax Description lt &lt; Less than sign gt &gt; Greater than sign amp &amp; Ampersand quot &quot; Double ...

www.web2generators.com/html-based-tools/online-html-entities-encoder-and-decoder

&quot;, quotation mark. ' &apos;, apostrophe. &, &amp;, ampersand. <, &lt;, less- than. > &gt;, greater-than. &nbsp;, non-breaking space. ¡, &iexcl;, inverted ...

www.ietf.org/rfc/rfc3076.txt

valid":"error" </compute> <compute expr="value>&quot;0&quot; &amp;&amp; value&lt;&quot;10&quot; ?&quot; valid&quot;:&quot;error&quot;">valid</compute>  ...

guide.freecodecamp.org/html/html-entities

HTML entities are characters that are used to replace reserved characters in HTML or for characters that do not appear on your keyboard. Some characters are ...