This document discusses mobile library services and technologies. It provides examples of types of services offered by mobile libraries, including SMS alerts, reference inquiries, mobile OPACs, library apps, publisher apps, augmented reality services using QR codes and location awareness. It also discusses mobile reference, guides, websites, discovery tools, and reading full text on different mobile devices. The document suggests considering where libraries are on the hype cycle for mobile technologies and ensuring services meet patron needs. It provides resources for learning more about mobile library services and joining the community of practitioners.