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  2. HTML - Wikipedia

    en.wikipedia.org/wiki/HTML

    HTML is a markup language that defines the structure and presentation of web pages. It is one of the core technologies of the World Wide Web, along with CSS and JavaScript. HTML allows creating and formatting text, images, links, tables, forms, and other elements on a web page. Learn more about the history, syntax, and features of HTML on Wikipedia.

  3. Character encodings in HTML - Wikipedia

    en.wikipedia.org/wiki/Character_encodings_in_HTML

    HTML's usage of character references derives from SGML. HTML character references. A numeric character reference in HTML refers to a character by its Universal Character Set/Unicode code point, and uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  5. HTML element - Wikipedia

    en.wikipedia.org/wiki/HTML_element

    An HTML element is a type of HTML (HyperText Markup Language) ... CODE existed in HTML Internet Draft 1.2, and was standardized in HTML 2.0; still current.

  6. List of XML and HTML character entity references - Wikipedia

    en.wikipedia.org/wiki/List_of_XML_and_HTML...

    In HTML and XML, a numeric character reference refers to a character by its Universal Character Set/Unicode code point, and uses the format: &#xhhhh; or &#nnnn; where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form.

  7. Heart Disease: 8 Lifestyle Factors Can Reduce Your Risk and ...

    www.healthline.com/health-news/8-lifestyle...

    The U.S. Centers for Disease Control and Prevention cites statistics showing that heart disease is the No. 1 killer in the nation among women, men, and most racial and ethnic groups.. In fact, the ...

  8. Web colors - Wikipedia

    en.wikipedia.org/wiki/Web_colors

    e. Web colors are colors used in displaying web pages on the World Wide Web; they can be described by way of three methods: a color may be specified as an RGB triplet, in hexadecimal format (a hex triplet) or according to its common English name in some cases. A color tool or other graphics software is often used to generate color values.

  9. Why Are Girls Starting Menstruation Early? What ... - Healthline

    www.healthline.com/health-news/girls-starting...

    A recent study analyzed data from more than 71,000 females in the United States using the Apple Research App on their smartphones. The findings, published May 29 in JAMA Network Open, indicate the ...