A Codex is a written code or set of rules. From the Latin caudex for "trunk of a tree" it refers to a block of wood or a book constructed of a number of sheets of paper made from wood. The WordPress Codex is an online reference book that contains the code/rules/information about WordPress.
The WordPress Codex
The WordPress Codex, while comprehensive, tends also to be very technical. Many non-programmer business users of WordPress find it to be daunting, confusing, overwhelming. Thus the WordPress Business Network. We look at WordPress from a decidedly business point of view and will help you translate the WordPress Codex from Geek to everyday English.