This document discusses modern technology and provides examples of vocabulary words and phrases used to describe different technologies. It then discusses 3D printers, their key feature of printing 3D objects, and positives and negatives like their ability to make complex designs easily but also their expense. It also notes potential problems like printing dangerous objects. The document next discusses Google Glass and prompts the reader to use the key phrases to describe this technology's features, positives, negatives, and potential problems.