Beat me to posting about the Songbook, but this one's a much funnier article about it: https://arstechnica.com/information-technology/2014/08/tripp...
Prev HN discussion about it: https://news.ycombinator.com/item?id=25227824
Some select lines that I found particularly amusing:
We don't pretend we're gay.
We always feel that way,
Because we're filling the world with sunshine.
With I.B.M. machines,
We've got the finest means,
For brightly painting the clouds with sunshine.
—from "Painting the Clouds with Sunshine"