HTML

A Document Type Definition (DTD) is a document that allows a program, such as a web browser, to properly parse a markup language that is formatted according to a specific use. HTML and its XML-based brother XHTML are probably the most common DTDs today, supplying web browsers with the guidelines for properly rendering web page elements.

Further Reading

W3C Definition of DTD

A markup language is a set of tags that describe the content of a document. The most common markup languages today is HTML a markup language is not a programming language, hence it is a misnomer to 'code' HTML. XML has introduced extensibility into HTML called XHTML. This new more versatile language can incorporate many types of media, other than plain text; and web browsers are constantly adding more support for W3C languages such as SVG and XSLT. XML has strict rules that can increase the learning curve for a person new to XML-based markup.

HTML is short for Hyper Text Markup Language, and it is the most widely used markup language for storing and broadcasting information on the world wide web. HTML can be used in conjunction with CSS and JavaScript to create a rich visual and interactive experience within a web browser.

Typography has been around since the printed word was invented. The above image is an example from iso50.com, where amazing work is collected, created, and  discussed.

Typography: The art or process of setting and arranging types and printing from them.When this definition comes into the mix with web design, we experience why it is such a vital part of the front-end design.

I'll be the first to say I love Javascript. I have two big Javascript books to my right to prove it. It's one of the greatest things about the web two-point-oh! movement (yes, I hate that term). And I love milk. But I will also be the first to say I hate how some people misuse Javascript.