Software you talk to in ordinary words instead of menus. It will often agree with you if you push back, so treat a confident answer as a first draft, not a verdict.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
a clerk you can simply talk to.
For example
You tell it that it is wrong. It apologizes immediately and agrees with you — even on the occasions when it was right.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.