Cheryl Watson’s Tuning Letter

Welcome to the new home of Cheryl Watson’s Tuning Letter.

As proud stewards of that legacy, on this page you will find the same treasure trove of information that you would before at watsonwalker.com and watsonwalkerpublications.com.

If you’re already a subscriber, Login at the right to find a full library of past issues going all the way back to the first Tuning Letter issue in 1991.

If you’re not a subscriber see the following links to see what you’re missing.

Bookmark this page to also find the latest CPU Chart, containing over 40 attributes of all IBM mainframes from the most recent models to all business class and enterprise class models since the z900, as well as previous CPU Charts, providing information for CPUs as far back as the 0.8 MIPS 370/155.