Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great introduction to computer technology

As somewhat of a computer geek myself, I already knew many of the concepts the book presented, but I was honestly amazed at how up-to-date the book was and how effectively it made its explanations. It's true that any level of computer user will find something they didn't know in this guide. I highly reccommend it, especially to folks who may have no idea how to use a computer - it's a good start.