The first four are the foundation technologies and others are the business activities that use them.
Specifically the business forms are for collecting and processing information from user input, the E-commerce systems for selling, and the content systems for publishing.
Collectively they both apply and call upon the first four, more technical chapters.
I started using the generic term categories then switched to chapters, giving the feel that this site is evolving as an interative E-Book.
Of course the master side could be product categories, and the detail (pages) could be product details, hopefully drawing a strong comparison with E-commerce sites.
But there's no shoppping basket here, that's a significant point, a shopping basket is just another control, a piece of functionality that can be injected on any page any time anywhere; as and when required.
This is a round about way of saying at the site level content and E-commerce systems are very similar.
In fact webica.net is just one page, you can read more on that here.
As this site moved forward with it's mix of technical developer and technical business driven articles so further controls (from a library loaded on the Web server) will be loaded into individual pages you read as and when you request them.