Re: Z16 principles of operation

[Dan Greiner]

For the past twenty years or so, the z/Architecture Principles of Operation has 
become available on the first day of the product's general availability. 
According to the z16 announcement letter, that is May 31. See 
https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/1/897/ENUS122-001/index.html