Resources and URIs

HTTP allows a browser, or another user agent, to communicate with different resources on the Internet: to do this the browser needs both the identity and the location of the resources. These two bits of information are described by a URI.

Identifying resources on the Web
URIs and how to access resources on the Web.
Data URIs
A specific kind of URIs, data URIs, embed the resource itself inside the identifier.
Choosing between www and non-www URLs
Advice on using a www-prefixed domain or not, this article explains the consequences of the choice as well as how to make it.
MIME Types
MIME media types define what kind of document a specific resource is. This article presents both the syntax and the most useful MIME types for use on the Web.
Common MIME types
List of common MIME types useful for Web developers.