intel sample specification (S-spec)

Quick Reference Guide
Overview

CPU Info @ PLASMA Info @ intel site
Pentium   web link
Pentium Pro   web link
Celeron   web link
Pentium II   web link
Pentium II Xeon   web link
Pentium III available web link
Pentium III Xeon   web link
Pentium 4 available  
Itanium    

intel webpage to search for S-spec numbers: http://processorfinder.intel.com/scripts/default.asp
intel webpage to search for Processor numbers (3xx / 5xx / etc): http://www.intel.com/products/processor_number/info.htm