Intel Processors in the order of innovation

It is getting a bit confusing as Intel is using different brand names, but maybe later it gets much more straightforward as the processor names for desktops and laptops are being chosen similarly.
I was browsing Intel's website for the new offerings. Here is the list of current and upcoming desktop processors as of July 2006:

• Intel® Core™2 Extreme processor
• Intel® Core™2 Duo processor
• Intel® Core™ Duo processor
• Intel® Pentium® processor Extreme Edition
• Intel® Pentium® D processor
• Intel® Pentium® 4 processor Extreme Edition supporting Hyper-Threading Technology
• Intel® Pentium® 4 processor supporting Hyper-threading Technology
• Intel® Pentium® 4 processor
• Intel® Celeron® D processor
• Intel® Celeron® processor

And here is my favorite, Intel Dual-Core Processors for Dual-Prosessor Servers: Dual -core Xeon and Itanium