On Fri, 1 Mar 2019 17:55:59 +0000, Seymour J Metz wrote:

>I can see making copies for laptops off of the Internet, but dead tree? I wish 
>I didn't believe you.

There is one manual that I use nearly every day, and I routinely print it when 
a new one is released. 
That is the z/Architecture Reference Summary.

I use the Principles of operation nearly as often, and I keep the PDF of latest 
edition open.

-- 
Tom Marchant

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