Give them the book "Free Software for Busy People" (Score 1)

May I suggest my book, "Free Software for Busy People"? The web version is free readable here and the PDF version is here.

I wrote it for just this situation - people who aren't computer professionals don't understand open source, nor why they should bother to understand it. I wrote the book to be enjoyable enough to read in bed, and so far early feedback is that it's true.

As they're business folks, you might want them to focus on the examples of Mr Big, the Fortune 500 CEO character in the book.

Hope this helps!
mo