Ramblings of an old Doc
DrJBHL's Articles for December 13, 2018
December 13, 2018 by DrJBHL
It goes like this...

B Updates: They're the Patch Tuesday Updates. 

"The big updates most people are familiar with come out on “Patch Tuesday,” the second Tuesday of the month. These are called “B” updates because they’re released in the second week of the month. That explains why there are no “A” updates, as Microsoft doesn’t generally release updates in the first week of the month.

B updates are the most important updates, ...