Что обозначают префиксы W, E, X, L процессоров Xeon и суффиксы K, S, T у Core i7 2 поколения?

Xeon: http://www.intel.com/products/processor_number/about/xeon_itanium.htm

Остался лишь загадкой префикс W. Про него я нашел лишь следующее:

The W prefix is only used for the single socket Xeon W3500 series and Xeon W3600 series, which are often used in workstations. I have not found any official documention for what the W stands for, or means. It could be Workstation.

Источник: http://sqlserverperformance.wordpress.com/2011/04/10/a-sql-server-hardware-nugget-a-day-day-10/

Core: http://www.intel.com/products/processor_number/about/core.htm